An in-line amplifier which can be connected to handset with modular plug. User can keep his/her own telephone. Key Features: • Tone control for clear sound • Extra amplification up to 40dB on receive, allowing hearing impaired persons to communicate without any problems via the telephone. • Extra boost button, to give extra amplification on receive when needed. • Compatible with handsets which have modular plug connection. Suitable for standard wiring (attention!) • Battery powered no need for AC/DC connection.
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