The Serene UA-45 inline phone amplifier can be attached to any standard corded phone to provide additional handset amplification up to 45dB. Volume control uses a rotary dial for longer life and adjustable tone control has three discrete settings for better precision. This model does not have the additional jack for headset use. Uses one 9V battery (not included).
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WARNING: There are products on this website which can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to 