BLUETOOTH Neckband

Wear Method:In-ear In-lineControl:Wireless Speaker:∅ 10 mm Impedance:32 Ω ± 20 % Speaker Sensitivity:104 ± 3 dB Frequency response:20Hz-20kHz Rated Power:5mW MIC Directivity:Omnidirectional MIC Sensitivity:-42 ± 3 Weight:1.3 oz playtime : 20 hrs Transmission Distance : 10-15 cm Standby Time : 480 hrs Battery:180 mah