Main Features‎:‎Bluetooth 4.1 EDR CSR8635 stereo chipset‎,‎ mellow alto‎,‎ bright high pitch‎,‎ powerful bass gold‎-plated antenna‎,‎ up to 10m working rangeSupport battery status display on part of smartphonesMulti‎-connection function‎,‎ allows connecting with 2 Bluetooth devices at the same timeEnglish voice promptBuilt‎-in 75mAh rechargeable Li‎-polymer battery‎,‎ lasts for 6 ‎- 8h talking time Model‎:‎ S5 Color‎:‎ Black‎,‎Blue‎,‎Green‎,‎Pink‎,‎Red Wearing type‎:‎ In‎-Ear Function‎:‎ Answering Phone‎,‎Bluetooth‎,‎HiFi‎,‎Microphone‎,‎Multi connection function Connectivity ‎:‎ Wireless Connecting interface‎:‎ Micro USB Application‎:‎ Mobile phone‎,‎Sport Impedance‎:‎ 16ohms±15 percent Sensitivity‎:‎ 40dB±3dB Talk time‎:‎ 6 ‎- 8 hours Standby time‎:‎ 150 hours Charging Time ‎(‎h‎)‎‎:‎ about 1.5 hours FM frequency range‎:‎ 2.401‎-2.480GHz Bluetooth‎:‎ Yes Bluetooth version‎:‎ V4.1 EDR Bluetooth distance‎:‎ W/O obstacles 10m Bluetooth protocol‎:‎ A2DP‎,‎AVRCP‎,‎HFP‎,‎HSP Bluetooth mode‎:‎ Hands free‎,‎Headset Battery Capacity‎(‎mAh‎)‎‎:‎ 75mAh Product weight‎:‎ 0.047 kg Package weight‎:‎ 0.047 kg Package size ‎(‎L x W x H‎)‎‎:‎ 9.50 x 7.50 x 3.70 cm / 3.74 x 2.95 x 1.46 inches Package Contents‎:‎ 1 x Earbuds‎,‎ 2 x Pair of Ear Plugs‎,‎ 1 x Pair of Ear Hooks‎,‎ 1 x English User Manual‎,‎ 1 x USB Cable