HBS730 , Stereo bluetooth headset , CSR 4.0 with  Handsfree call , Neckband 

1. The battery time: 15 hours / 540 hours standby
2. Music Time: about 10H
3. Transmit power: Class 2
4. transmission range: about 10M
5. Bluetooth version: 4.0
6. Running, walking, cycling, sports, and outdoor enthusiasts:
7. Put the phone in pocket or backpack, easy to enjoy your music and calls.
8. packing size: 22.8(L)*17.5(W)*4.4cm(T)
9. bluetooth size: 167.3mm(L)*135.6mm(W)*16.9mm(T)
11. weight: 0.19kg
12. Running, walking, cycling, sports, and outdoor enthusiasts:
13. Put the phone in pocket or backpack, easy to enjoy your music and calls.

Features:

1. Wireless headphone easy to controls between calls and music
2. Play or pause music, skip tracks, or start and end calls with the simple control keys
3. An embossed surface makes the keys easy to find, even when you're on the go
4. Adjust the volume with a simple twist of the control knob
5. Flow effortlessly between music and calls with automatic call switching
6. Wireless stereo sound for music and calls
7. Long talking and music time
8. Product appearance of small and exquisite and delicacate.