1. Standby time: Up to 5 days or 120 hours 2. Range: 10m 3. Battery type: Rechargeable， non-replaceable lithium ion polymer 4. Charge time: >3 hours for full charge， 5. Bluetooth version: V3.0+EDR(Enhanced Data Rate) and V2.1/V2.0and V1.2 standard， 6. Bluetooth profiles: Headset (HSP) and hands-Free (HFP) 7. Working voltage: 3.3 ~ 4.2 V Charging voltage: 5V Charging current: 90 maA Weight: 110g Package Size: 21x13x3cm