Product Description:General Model : CI3 Wearing type : In-ear with ear hook Function : Answering phone， Bluetooth， Waterproof， Noise Cancelling， Voice control， Song switching， Microphone Specification :Bluetooth: V4.1+EDR Support: A2DP， AVRCP， HSP， HFP， SPP Drive unit: 10mm Impedance : 16ohms Sensitivity: 110dB Connect Distance: About 10m Frequency: 20Hz-20kHz Degree of distortion: Talk time: 5 Hours Music: 5 Hours Standyby time: 160 Hours Charging time: 1-2 Hours Charge interface: Miscro-USB Package Including：1 x Bluetooth headset 1 x USB charging cable 1 x User Manual