Product Type: apartment intercom Handsfree phone Without display Dial: DTMF Output sensitivity: < 60mV> Frequency response: +_3dB (300Hz-3400Hz) Intercom working current :< 100mA> Plug into 220V AC power Color: White, Black & maroon available Origin: China Description Hellotel TS-250 is a hands-free dial telephone suitable for apartment management. The telephone buttons on it are very smooth, and comfortable so it doesn't create any obstruction while dialing. These telephones have Dual-Tone Multi-Frequency (DTMF) technology in which tones are transmitted over the voice channel when numbers are pressed by the telephone and are used to control automated equipment and signal user intent.
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