- Power up productivity for office workers with Voyager 4220 Office and UC Series Bluetooth wireless headsets
- Duo Bluetooth headset
- USB -A Bluetooth dongle
- For PC, laptop, smartphone, tablet and desk phones with USB port
- Bluetooth 4.1 technology with range up to 30 meters
- Talk time: up to 12 hours of conversation and 15 hours of listening pleasure
- Standby time: up to 13 days
- Advanced audio distribution profile (A2DP) 1.2, AVRCP 1.4
- Codecs: Music: SBC ,
- Mobile call: CVSD , mSBC, UC call, mono: mSBC, stereo: mSBC
- Speaker sensitivity: 94 dB SPL ± 4 dB
- Receiving frequency response: 20 Hz - 20 kHz
- Speaker impedance: 32 ohms
- Speaker size 32 mm
- Hearing protection: SoundGuard DIGITAL
- Battery capacity: 360 mAh (standard) / 350 mAh (minimum)
- Battery type: rechargeable lithium-ion polymer
- Charging time: fully charged in an hour and a half
- 2 microphones: 1 unidirectional; 1 directional MEMS
- Call control on the headset
- Call control: volume up and down, answer and end call and mute
- Multimedia control: forward / rewind / pause / play
