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Description:Features: 1) general radio 2) carrier frequency:2.4 - 2.480ghz 3) radio performance: C receiver 4) rx sensitivity: < -80dbm 5) radio performance: Bluetooth class 2, up to 5 - 10m (in open space) (max. Operating range depends on the paired phone model, battery power, and Environmental factors) 6) spread spectrum: Fhss (frequency hopping spread spectrum) 7) bluetooth profile supported: A) hsp (headset profile) B) hfp (hands-free profile) 8) antenna: Chip antenna 9) input power:5v,200 - 500ma, ac adapter 10) battery:3.7v/120ma/li-polymer/rechargeable 11) standby time/talking time:200h/6h (max. Operating time depends on the Usage frequency and environmental factors. A long distance wireless Connection and use with a mobile phone will increase power consumption) 12) led indicator status: A) blue: Power on mode or full charged B) red: Low power or being charged C) blue & red: Pairing mode 13) operating temperature: -10 - +55c