Wireless Version: V4.  1 + EDR

speaker impedance: 322

Microphones sensitivity: - 42Db

Frequency: 2.  4026GHz - 2.  480GHz

Battery: 3  7 / 60mAh rechargeable Li battery

Working temperature: - 10 - 55

Input: Dc5V  

supported file fomats: A2DP1.  3 / HFP1  6 / HSP1  2.  AVRCP1  6 / D11  3

Wireless distance: 33feet or10 meters in clear space

Playing time: 3 - 4 hours

Charging Time: 1 - 2 hours.  

standy timg  120 hours