Sports BT Earphones Neckband Lightweight Headphones 15H Music Playtime Noise Reduction

Features:
Unique neck-strap design for easy carrying; 
Ultra-light weight for all day comfort; 
Retractable Earphones; 
Noise reduction & Echo cancellation; 
A2DP, music player support; 
Same time connect two phones; 
Calls vibration; 
Lossless sound transmission; 
Amazing Battery Life, music time up to 15 hours and talking time 20 hours; 
Crystal clear soundThe Noise Cancelling quality for calling sounds natural and works great; 
Smart neckband design, no need to worry that the earbuds will drop off;

Specifications:
BT version: V4.2+EDR; 
Transmission distance: 10 meters (Obstacle free); 
Battery capacity: 350mAh; 
Talk time: 20 hours; 
Music time: 15-20 hours; 
Standby time: 200 hours; 
Charging time: 1-2 hours; 
Speaker：16Ω10mW x 2; 
Sensitivity: DBM -80; 
Signal to noise ratio: 95dB; 
Bearing: all directions; 
Frequency range: 20Hz-20KHz; 
Transmit power: 0dBm. Second (4dBm Max); 
Working voltage: 3.7V; 
Package Size: Approx. 20*17*2.5cm; 
Package Weight: Approx. 106g;

Package List:
1 * BT Headphone; 
1 * USB Charging cable; 
1 * User Manual