Product Feature 1. Brand new and high quality. 2. Connect two bluetooth moblie phone at the same time 3. Adjust the volume 4. Change music (change to the previous song and next song) 5. Mute microphone 6. Transfer calls 7. Answer or reject another call 8. Voice dialing 9. Redial the last call 10. Transmission range: 10 meters 11. Suitable for all Bluetooth enabled device 12.support Language:chinese/english/French/ Spanish Product specification - Bluetooth compatible specifications: V4.1 - Operating frequency band: 2.4GHz-2.48GHz unlicensed ISM band - Output Power: Class 2 power Output、 up to 10 meters - Support Profiles: HSP、 HFP1.5、 A2DP Profiles - Support Multiple Paired Devices: Up to 8 devices - Integrated with the SDP echo cancellation - Battery status display on the phone (only support IOS device) - Battery: 61mAh (Rechargeable Lithium Polymer)、 3.7V DC - Talk time: around 8 hours - Music play time: around 7 hours - Standby time: up to 130 hours - Charge time: less 2 hours - Power Input Voltage: 5V - Operating temperature range: -20C¡ã~ + 70C¡ã - Weight: 18g - Size: 62*39*13mm Package includes: 1 * Wireless Handsfree Headset 1 * Charging Cable 1 * Englishuser manual