Bluedio M2 Bluetooth V4.1 Wireless Stereo Sports Headphone Headset 
1. Exclusive HD drivers deliver crystal clear sound, never miss any music detail.
2. In-canal earbuds 4th generation fit nicely in your ears, you can wear them all day long.
3. Unique ear tips(S/M/L size included) help to keep the earbuds in your ears. Plus the control unit is lighterand smaller, no pulling at workouts.
4. Ultra-low Power of the latest Bluetooth 4.1 doubles playtime to a solid 5 hours.
5. Built-in Mic can be used for clear phone calls, never miss a call when enjoying music you love. 

 Specifications:
 Color: black, white
 Bluetooth version: V4.1
 Profiles: A2DP, AVRCP, HSP, HFP
 Drivers: 2*Φ0.56”
 Impedance: 2*16Ω
< SPL: 110 dB 

 1 x M2 Bluetooth Wireless Headphone
 1 x Charging cable
 3 x Eartips(S/M/L)
 1 x User manual