Type: Stereo headphone with MIC
Technology Standard: Blue tooth 2.1+EDR
Operation distance: >50m(barrier free)
Range of frequency: 2.402 to 2.480GHz ISM band
Specification of MP3/FM
PC interface: USB2.0
Music format: MP3
FM frequency response: 87.5-108MHz
Speaker: Φ40mm
Frequency response: 20-20KHz
Microphone unit: 4.5mm*2mm  ***dB±3dB
Continuous Playing Music: 8 h
Conversation Time: 8 h
S/N: 95dB
Colors: Camouflage red/yellow/blue/green