Video:
- How to Select a DAF Device (YouTube)
- How to Select a DAF Device (TikTok)
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Uses:
- Face-to-face conversations
- Telephone calls, Zoom meetings
- Fluency shaping speech therapy
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- Face-to-face conversations
- Telephone calls, Zoom meetings
- Fluency shaping speech therapy
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- Fluency shaping speech therapy
Altered auditory feedback:
- Delayed auditory feedback (DAF) adjustable for normal or slow speech, 30-200ms
- Frequency-altered auditory feedback (FAF) increases effectiveness, six settings from +0.8 to -1.2 octaves
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- Delayed auditory feedback (DAF) adjustable for normal or slow speech, 30-200ms
- Frequency-altered auditory feedback (FAF) increases effectiveness, two settings at -0.4 and -0.8 octaves
- Optional sine wave masking auditory feedback pulls stutterers out of silent blocks, 110 Hz
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- Delayed auditory feedback (DAF) adjustable for normal or slow speech, 30-200ms

SmallTalk includes Iasus NT5 throat microphone with monaural (one ear) acoustical coil earpiece.

Advantages:
- Awareness and control of phonation (vocal fold vibrations)
- Eliminates background noise
- Doesn’t block hearing
- Inconspicuous
- All-day comfort
Disadvantages:
- Monaural (one ear) sound 25% less effective
- Not quickly put on/taken off
- Doesn’t connect to phones or computers

SmallTalk includes Iasus NT5 throat microphone and binaural (two ears) earbuds.
Advantages:
- Awareness and control of phonation (vocal fold vibrations)
- Eliminates background noise
- Binaural (two ears) sound 25% more effective than monaural
- Inconspicuous
- All-day comfort
Disadvantages:
- Not quickly put on/taken off
- Doesn’t connect to phones or computers
- Can block hearing

SmallTalk includes Iasus NT5 throat microphone and Suunto Sonic Bluetooth bone-conduction headphones.
Advantages:
- Awareness and control of phonation (vocal fold vibrations)
- Eliminates background noise
- Binaural (two ears) sound 25% more effective than monaural
- No wire to headphones
- Doesn’t block hearing
- Quickly put on/take off headphones
- Inconspicuous
- All-day comfort
Disadvantages:
- Doesn’t connect to phones or computers
- Additional battery to charge
Iasus NT5 throat microphone is optional for the Basic Fluency System and School DAF,
$595.00Add to cart

SmallTalk and Basic Fluency System includes lavalier (lapel) microphone and Suunto Sonic Bluetooth bone-conduction headphones.
Advantages:
- Binaural (two ears) sound 25% more effective than monaural
- No wire to headphones
- Doesn’t block hearing
- Quickly put on/take off headphones
- Inconspicuous
- All-day comfort
Disadvantages:
- Background noise
- Doesn’t connect to phones or computers
Included microphones and headphones:

Koss Portapro headset
SmallTalk includes the Koss Portapro, the best lightweight headset available.
Advantages:
- Excellent sound quality maximizes immediate and carryover fluency
- Eliminates background noise
- Easy to put on and take off
- Comfortable
- Connects to phones and computers, ideal for professionals with many Zoom calls and phone calls
- Public speaking
- Conspicuous, good for starting conversations about stuttering
- Listeners can try the headset on to experience DAF-induced stuttering
Disadvantages
- Can block hearing
- Conspicuous
- Wired
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Logitech H110 headset
Basic Fluency System and School DAF include a Logitech H110 headset.
Advantages:
- Very good sound quality maximizes immediate and carryover fluency
- Eliminates background noise
- Easy to put on and take off
- Connects to phones and computers, ideal for professionals with many Zoom calls and phone calls
- Public speaking
- Conspicuous, good for starting conversations about stuttering
- Listeners can try the headset on to experience DAF-induced stuttering
Disadvantages
- Can block hearing
- Conspicuous
- Wired
- Not as comfortable or durable as the Koss Portapro

Plantronics MX100-S earphones
SmallTalk includes a Plantronics MX100-S binaural (two ears) wired earphones with microphone.
Advantages:
- Simple
- Binaural (two ears) sound 25% more effective than monaural (one ear)
Disadvantages
- Background noise
- May block hearing
- Wires
- We will discontinue these earphones when we run out of stock

Plantronics MX-100 earset
Basic Fluency System includes Plantronics MX100 monaural (one ear) wired earphone with microphone.
Advantages:
- Simple
Disadvantages
- Monaural (one ear) sound 25% less effective than binaural (two ears)
- Background noise
- May block hearing
- Wires
Connects to

SmallTalk and Basic Fluency System connect to iPhone (15+), Android, and laptops that have a USB-C connector. You hear the caller’s voice and your altered voice in your headphones. The caller hears your unaltered voice.
On request we can also provide connectors to:
- Lightning iPhone (14 and earlier)
- Landline with standard 2.5mm headset jack
- Landline with Cisco RJ-9 headset jack
- USB-A computer
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The School DAF does not connect to phones or laptops.
Optional accessories:
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- Basic Fluency System only: Masking manual button generates a 110 Hz sine wave that pulls stutterers out of silent blocks. Rarely needed, DAF/FAF eliminate silent blocks for almost everyone.
$99.00Add to cart
Batteries:
The SmallTalk includes a 400 mAH rechargeable battery that lasts eight to ten hours. The battery is custom made for us and is difficult to ship overseas. It wears out in a few years. We don’t recommend that foreign customers buy the SmallTalk.
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The Basic Fluency System and School DAF includes 2200 mAH rechargeable batteries. These powerful batteries need to recharged once a week. These are standard 14500 batteries, available anywhere in the world. Shipping lithium batteries by air is restricted. Some overseas customers may receive a 500 mAH 9V nonrechargeable alkaline battery. These customers can buy rechargeable 14500 batteries locally.
- Adapter for European electrical outlets.
$5.00Add to cart
- Adapter for British electrical outlets.
$5.00Add to cart
- Adapter for Australian electrical outlets.
$5.00Add to cart
Third-party payers:
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Size:
- 3″ x 2.25″ x 0.75″
- 7.5 x 6 x 1.75 cm
Weight:
- 2.8 ounces
- 80 grams
Color:
- Gray
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- 4.5″ x 2.7″ x 0.9″
- 11.5 cm x 7 cm x 2 cm
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- 4.6 ounces
- 130 grams
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- Black
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- 4.5″ x 2.7″ x 0.9″
- 11.5 cm x 7 cm x 2 cm
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- 4.1 ounces
- 118 grams
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- Almond
Connectors (order from us or Amazon):
- 2.5mm male TRS plug to 3.5mm male TRRS plug cable, custom-made for us (not available from Amazon).
- iPhone, Android, laptops: Saramonic Audio Interface connects our 2.5mm male TRS plug to 3.5mm male TRRS plug cable, available for USB-C and Lightning.
- iPhone, Android, laptops (not recommended): 3.5mm female TRRS jack to USB-C plug connects our 2.5mm male TRS plug to 3.5mm male TRRS plug cable.
- Landlines: 2.5mm male TRS plug to 2.5mm male TRS plug cable connects SmallTalk and Basic Fluency System to landlines with standard 2.5mm headset jacks.
- Office telephones: 3.5mm TRS female to RJ-9 male and a 2.5mm TRS male to 3.5mm TRS male cable connects SmallTalk and Basic Fluency System to office telephones.
- Older computers with USB-A connectors: use our 2.5mm male TRS plug to 3.5mm male TRRS plug cable with a 3.5mm female TRRS jack to USB-A adapter. https://www.amazon.com/gp/product/B07RS11M1T/ .

Warranty:
- 100% moneyback, 60 days if you are trained by an SLP
- 90% moneyback, 30 days if you don’t get training
We have this dual warranty to motivate you to get training. Only customers who haven’t been trained to use their devices call us wanting to return them. When we tell them they’ll get more money back if they get training most make an appointment with an SLP. Then they are happy with their devices. Our return rates are less than 1% annually. Training with an SLP is at the customer’s expense. Any SLP who practices fluency shaping therapy can train you to use our devices.
Foreign Distributors
Bulgaria
Blaniko Ltd
Kyustendil, Bulgaria
0882 700 306
Website: https://specialnite-deca.bg/
E-mail: info@specialnite-deca.com
Norway
NorResource
Helsesenteret Horten Sykehus
Harald Pedersensgt. 9
3182 Horten NORWAY
Website: http://www.stamming.com
E-mail: tom@norresource.no
South Korea
53-16 Ogum-dong
Songpa-Gu
Seoul 138857, SOUTH KOREA
Telephone: +82-2-443-4456
Fax: +82-2-443-4457
Website: http://www.apsuninc.com/
E-mail: info@apsuninc.com
Sweden
Stefan Tingström
RehabCenter AB
Enhagsvägen 18
TÄBY S-187 40 Sweden
(468) 768 2500
Website: http://www.rehabcenter.se/
E-mail: stefan@rehabcenter.se
Taiwan
Jennifer Lin
Reference Technology Ltd Co
1F., No. 5, GongYeQu 10th Rd.
Taichung 407 Taiwan
+886 (4)2358-1600
E-mail: jennifer@sancordon.com.tw
Other Countries
Order directly from Casa Futura Technologies or ask a local speech clinic to order a device for you. Shipping (USPS Global Express Mail, insured) is usually around $75. For exact shipping cost and time see the USPS website (click “Add Extra Services” to add insurance and the pick-up charge) or the UPS website. The “ship from” location is “Boulder, Colorado, 80303” and the shipping weight is three pounds.



