Serene Innovations Phone Amplifier Model UA-50
⚠️ Special Order Item — Please allow 10–14 business days to ship. This item is affected by tariffs.
Landline Telephone Amplifier
The Serene UA-50 Home or Business Telephone Amplifier increases incoming volume for the telephone handset or headset by up to 45+dB.
It converts virtually any corded analog landline phone into an amplified telephone.
- Amplifies incoming voices up to 170 times (45+dB)
- Tone Control — adjust incoming voice to match your hearing loss
- Works with virtually all corded analog home or business telephones (not VoIP systems)
- High Definition Sound (HDS) technology eliminates distortion, echo, and unwanted static
- Digital Tone Enhancement boosts speech frequencies for improved word clarity
- Automatic Volume Control optimizes sound level for superior listening comfort
- AC adapter included
- Backup battery (9V) not included
- One-year warranty
UA-50 FAQ
Q: Can I use a headset with 2.5mm plugs?
A: Yes, but you need a connector adapter from Serene Innovations (sold separately).
Q: Can I amplify the handset and headset simultaneously?
A: No. The UA-50 can only amplify one at a time.
Q: What type of battery is used?
A: A standard 9V alkaline battery (optional backup). The AC adapter is the primary power source.
Q: What happens during a power outage without a battery?
A: The UA-50 will not work. Set the compatibility switch to position 7 to bypass the amplifier and hear unamplified sound.