Vocalism Principle: Dynamic
Control Button: Yes
Active Noise-Cancellation: No
Communication: Wireless+Wired
Volume Control: Yes
Sensitivity: 103±3dBdB
Wireless Type: bluetooth
Is wireless: Yes
Line Length: 1.0mm
Support APP: No
Function: For Mobile Phone
Connectors: 3.5mm
Model Number: E87
Support Memory Card: Yes
Resistance: 32ΩΩ
Waterproof: No
With Microphone: Yes
Bluetooth Version: V4.1 JL
Working Range: Up to 8m
Working Time : Up to 8h
Driver diameter : 40mm
Charging Time : around 2h
Charing cable : 30cm
Color : red, blue, black