Descriptions: 1. Portable wireless bluetooth headset，easy to carry 2. Bluetooth 4.1 low Energy technology，the headset owns longer working time 3. High strength waterproof and sweat design，effectively prevent sweat and rain interfere with headset operation 4. Support multipoint pairing，connect to 2 mobile phones simultaneously 5. Two languages voice prompt(Chinese， English)， to communicate with you in your language 6. Perfect sound，bring clear sound and amazing feeling 7. Human engineering design and high quality materials make the headset comfortable for daily use 8. Compatible with most of the smart cell phones，computer and other device which has bluetooth function Specification: * Bluetooth Version: Bluetooth 4.1 * Support Profiles: A2DP，AVRCP，HSP，HFP * Transmission Distance: Up to 10m (free space) * Frequency Range: 2.4GHz-2.48GHz * Talk Time: about 7hours * Music Time: about 7hours * Standby Time: 160hours * Charing Time: about 2hours * Cable Lenght: 580mm * Net Weight:15g * Color:black，white Package Included: 1 * M2 Bluetooth Headset 3 * T-light Earplug(L/M/S) 1 * USB Charging Cable 1 * User Manual