Specifications: Pure Music / HD Call / English Voice Prompt / Cozy Wear General Features: Portable Function: Answering Phone,Bluetooth,Microphone,Song Switching Language: English Material: Plastic Type: In-Ear Wearing type: In-ear with ear hook Product Details Application: Sport Charging Time.: 1h Compatible with: Computer, Mobile phone Connecting interface: 2.5mm Connectivity: Wireless Driver unit: 10mm Frequency response: 20Hz – 20KHz Impedance: 36ohms Music Time: 6h Plug Type: 2.5mm Sensitivity: 94dB Standby time: 60h Talk time: 4h Extended Function Bluetooth: Yes Bluetooth distance: W/O obstacles 10m Bluetooth protocol: A2DP,AVRCP,HFP,HSP Bluetooth Version: V4.1 FM radio: No Battery Information Battery Capacity(mAh): 120 Dimension and Weight  Package size (L x W x H): 13.00 x 8.00 x 4.00 cm / 5.12 x 3.15 x 1.57 inches Package weight: 0.1020 kg Product size (L x W x H): 4.50 x 1.80 x 1.40 cm / 1.77 x 0.71 x 0.55 inches Product weight: 0.0920 kg Package Contents: 2 x Headset, 1 x English Specification, 1 x USB Cable