welcome buy google cardboard 2.0 🙂 (click the picture to buy it )
Features of this earphone :
1. Wireless TV connection, the effective distance is 20 meters to 30 meters.
2. Wire connect 3.5MM audio interfaces devices such as CD, TV, computers, mobile phones etc..
3. Built-in FM radio headphones, listening to the radio anytime, anywhere.
4. NdFeB pronunciation unit and high-quality gold-plated pin headphone components, pristine sound quality.
style: Wrieless, 3.5mm
Speaker Dimension: Φ40mm
Frequency Response: 10Hz-20KHz
Sensitivity: 92 ± 3dB at 1KHz
Voltage: 2.0~3.0V, 2*AAA
Wireless Headphone Receiving Frequency: 109Mhz/110Mhz
Radio frequency: 87.5~108.0MHZ
Receiving frequency response: 20~20KHz
S/N rate: >60dB
Voltage: 2.0~3.0VDC, 2*AAA
Electric current: 40mA
Transmitting Frequency: 109Mhz/110Mhz
Work distance in vast place : 20M~30M