--- product_id: 11364091 title: "Serene Business Phone Amplifier (UA50)" brand: "serene innovations" price: "€ 172.58" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.hr/products/11364091-serene-business-phone-amplifier-ua50 store_origin: HR region: Croatia --- # Digital Sound Processing clarity 45dB voice amplification Universal RJ9 headset compatibility Serene Business Phone Amplifier (UA50) **Brand:** serene innovations **Price:** € 172.58 **Availability:** βœ… In Stock ## Summary > πŸ”Š Elevate your callsβ€”hear every word, miss nothing. ## Quick Answers - **What is this?** Serene Business Phone Amplifier (UA50) by serene innovations - **How much does it cost?** € 172.58 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/11364091-serene-business-phone-amplifier-ua50) ## Best For - serene innovations enthusiasts ## Why This Product - Trusted serene innovations brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Tailored Audio Boost:** Digital Tone Enhancement lets you customize speech frequencies to catch every word. - β€’ **Universal Compatibility:** Seamlessly connects with any RJ9 headset and virtually all business phones via patented tech. - β€’ **Noise-Free Communication:** Digital Sound Processing eradicates distortion, echo, and static for pristine audio. - β€’ **Crystal-Clear Conversations:** Amplifies incoming voices up to 45dB for unmatched clarity in every call. - β€’ **Upgrade Your Call Experience:** Transform routine calls into professional-grade conversations that set you apart. ## Overview The Serene Business Phone Amplifier (UA50) boosts incoming voice volume by up to 45dB, compatible with any RJ9 headset and most business phones. Its patented technology and advanced Digital Sound Processing eliminate distortion and static, while Digital Tone Enhancement customizes speech frequencies for superior clarity. ## Description - Amplifies incoming voices up to 170 times (45+ dB) so you hear every word with unmatched clarity- Selectable digital tone enhancement allows you to boost and enrich the speech fequencies you can't hear well making difficult to hear words intelligible again- Automatic gain control optimizes sound level for superior listening comfort- Easy headset/handset selection button for extra convenience- Latest digital sound processing technology eliminates virtually all distortion echo effects and unwanted static commonly found in other ordinary amplifiers- Works with virtually all business telephones and headsets; it connects between phone's handset/headset and base- AC adapter included battery (9V) optional ## Features - Amplifies incoming voices up to 45dB on your handset or headset. - Can be used with any headset with an RJ9 plug. - Patented technology enables the amplifier to work with virtually all business telephones. - Digital Sound Processing technology eliminates virtually all distortion, echo effects and unwanted static. - Digital Tone Enhancement allows you to boost and enrich the speech frequencies you can't hear well. ## Product Details - **Brand:** Serene Innovations - **Color:** Neutral - **Material:** Plastic - **Model Name:** UA-50 - **Power Source:** Battery Powered ## Images ![Serene Business Phone Amplifier (UA50) - Image 1](https://m.media-amazon.com/images/I/61-qaX51xUL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works very well I can hear the phone clearly! *by C***R on July 20, 2019* I tried a few other amplifiers that I had used at another job and those did not work on the new work phone so I tried this and it works very well. I can actually hear all the callers which is very important for my job! The sounds is very clear and easy to change from handset to headset you do have to push down the headset botton when you want to hear from the headset I was used to this with my old ampliefiers so once you get used to switching back and forth you are good to go. The volume gets pretty loud I use it at about 40 -50 % capacity if you will and this is perfect with a normal phone I was maxing the phone volume out and still not hearing properly so this does boost the volume as stated. Please note you have to buy the 50 ( the more expensive one) if you want it to work with a headset but the cost is not bad considering. ### ⭐ Doesn't work as advertised *by R***X on May 8, 2022* It would only work with my headset if plugged into telephone jack on Amplifier and even then with occasional screeching which would stop if volume reduced so low I lost enough amplification that I couldn't hear other party. Telephone handset plugged into headset jack at same time would not work at all with or without Headset button activated. Only Compatibility setting no. 1 worked. No 5 had terrible screeching at any volume setting. I don't think this unit was designed very well. Will try something else. ### ⭐⭐⭐⭐⭐ The "Cadillac" of telephone amplifiers *by J***R on March 27, 2014* This amp is amazing! Easy to hook up with in seconds and has tons of power for volume and tone. Buy the Serene Innovations UA-50 (IMHO - The Cadillac of amplifiers) and you will never have another problem hearing on the phone no matter what level of hearing loss. I went to work and installed the optional 9 volt (also comes with power cord) and installed it to my office phone all in about 40 seconds. I first adjusted the phone "compatibility" switch on the right side of the unit. Second, I adjust the "tone". For me, I have high frequency / high pitch hearing loss. I click the "tone" switch up two notches and all my phone calls are crystal clear. Lastly, I adjusted the volume knob to the first white block on the unit - simple as that. There is a "boost" button but with the amount of "horsepower" even before engaging this feature, I can say with certainty I will never use it. There is also a "headphone" button next to the "boost" button so you can utilize headphones. The reason for me using the optional 9 volt is so I can move the device to another office phone in a jiffy. Definitely a five star product and highly recommend to anyone with hearing loss. I have no regrets for spending this type of money for a phone amplifier. ## Frequently Bought Together - Serene Business Phone Amplifier (UA50) - UL Listed 9V AC Power Adapter for Arduino UNO, Power Supply Cord for Crosley Cruiser CR8005A, Schwinn Bike A10 A20 A40 220 430 Elliptical Trainer - Center Positive 5.5x2.1mm Plug (6.6ft) - Serene Portable Phone Amplifier (UA30) --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/11364091-serene-business-phone-amplifier-ua50](https://www.desertcart.hr/products/11364091-serene-business-phone-amplifier-ua50) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-14*