Product Features
Compatible with Bluetooth V4.0 specification standards. Use advanced CSR Bluetooth chip.
Supports A2DP enabled mobile phone to listen to music 
Comfortable to wear sports / outdoor use
Built-in DSP (digital signal processing) noise suppression and echo cancellation function.
Battery Type: Lithium-Ion battery, 3.7V / 40mAh, Talking time: 3 hours, Standby time: up to 100hours, Charging time: 1 to 2 hours.
Support HSP, HFP1.5, A2DP Bluetooth protocol specification 
Support for multiple paired devices, which can match up to 8 Bluetooth devices
Battery status display on the phone (depends on support of the phone)

Product Specifications
Bluetooth standard: V4.0 
Working frequency: 2.4GHz ~ 2.48GHz ISM band
Output power: Class 2 power output, up to 10 meters
Battery type: 3.7V / 40mAh (rechargeable lithium-polymer)
Talk time: about 3 hours
Music Play time: 2 hours
Standby time: about 100 hours
Charging voltage: 5V500 mAh
Operating temperature range: -20 ℃ ~ +70 ℃

Support Accessories
USB charging cable
USB Travel Charger (optional)
USB car charger (optional)
Manual: 1pc
Warranty Card: 1pc
Package Type: Each pc into gift box, then Master carton.