HP HP Poly Savi 7220 Office Binaural DECT 1880-1900 MHz Headset - On-ear / via RJ-11 / Black

Compatibility Compatible with desk phones via RJ-11 cable or DECT™ Color Black Charge time <3 hours Charging type 1-way base Battery life Up to 12 hours (talk time) Battery type Rechargeable Li-ion HP Polymer Paired devices Up to 4 Button user controls Call answer/end; Mute; Volume +/-; Power on/off Headphone type On-ear (stereo) Microphone type Noise cancelling Speaker bandwidth 300 Hz to 3.3 kHZ (narrowband mode); 100 Hz to 6.8 kHZ (wideband mode) Microphone bandwidth 100 Hz to 6.8 kHz Ear cushions Artificial leather (surface material) Security AES 64 bits encryption; DECT™ security certified