OEM orders Bluetooth Earphones, Waterproof, Bluetooth 4.0, Noise Reduction Sports Earphones >Product Feature: >Bluetooth Version: V4.1 >Operating distance: 10-15m >Battery: 70mAh/3.7V >Standby time: ≥1120hrs >Playing time: up to 4hrs >Headset Specification: >Speaker diameter: ￠10mm >Impedance: 16Ω >S.P.L: 111±3dB/1KHz >Rated power: 3mW >Frequency Response: >20Hz-20KHz >Mic Specification: >Microphone Unit: ￠4*1.5mm >Directivity: Omnidirectional >S.P.L: -42±3dB >Impedance: ≤2.2kΩ >Frequency Response: 100Hz-10KHz >Operating voltage: 2V >Shenzhen Aoni Electronic Industry Co., Ltd