... with no cords 2.2.4g wireless headphone with 3.5mm jack 3.with volume ... Transmission distance and range(8m,360°) 10: Headset Spec.: frequency response:20-20KHz,SRN:85dB,working ... 10kHz&SRN≥55dB&Sensitivity:-42dB12:Double charger for headphone and USB jack or 3.5mm jack ... than 1000pcs)Packaging list: Wireless Headset, charger,instruction book,3.5mm transmitter Bluetooth headset hidden/with microphone