BH-M56 is a Sports Stereo Bluetooth Headset that designed specifically for sports， it comes with waterproof level IP3，
not less than eight hours of time for listening to music under maximum volume and very convenient for charging
(use standard micro USB jack， 5V charging voltage)， support bluetooth 4.1 communication protocol (HFP V1.6， HSP V1.2， A2DP， V1.2， AVRCP V1.4)，
TTS voice prompt.

Bluetooth specification
Bluetooth: v4.1
Headset Size:152*134*50mm
The built-in lithium battery voltage: 3.7V
Battery Capacitance:150mAH
Speaker size:Φ13mm
Speaker weight: about 35g
SNR: !#!gt!*!=80dB
Charging voltage: 5V
Charging time: about 2 hours
Charge Current: !#!lt!*!=100mA
Headphone power: 3-5mW， THD!#!lt!*!=10%
Talk/Play music time:About 8 hours
Operation frequency:2.402-2.480GHz
Chip solution: CSR8635A04
Operation range:UP to 10 meters
Standby time:About 300 hours(Connected mode)