OUNA B616 Wireless Headphone

Specifications: Model Number: B616 Style: Wireless, 3.5mm, Speaker Size: Φ40mm Impedance: 32Ω±15% Frequency Response: 10Hz-20KHz Sensitivity: 92±3dB at 1KHz Wireless Headphones: Voltage: 2.0-3.0V, 2 * AAA (battery not included) Electric Current: 40mA Wireless Headphone Receiving Frequency: 109Mhz / 110Mhz Frequency: 87.5-108.0MHZ Receiving Frequency Response: 20-20KHz S / N rate: >60dB Transmitters: Voltage: 2.0-3.0VDC, 2 * AAA (battery not included) Electric Current: 40mA Transmitting Frequency: 109Mhz / 110Mhz Work Distance in Vast Place: 20M-30M Color: Black Headphone Size: Approx. 17.7 * 15.6 * 6.5cm / 6.96 * 6.14 * 2.56in Headphone Weight: 118g / 4.16oz Transmitter Size: Approx. 11.6 * 6.8 * 1.5cm / 4.56 * 2.67 * 0.59in Transmitter Weight: 47g / 1.68oz Package Size: Approx. 21.6 * 19.1 * 4.5cm / 8.50 * 7.51 * 1.77in Package Weight: 278g / 9.81oz Package List: 1 * On Ear Headphone 1 * Transmitter 1 * Audio Cable 1 * User Manual