Main Features:- Hook style sport earphone, freely take the call even when you are running- 10mm noise canceling driver unit, enjoy beautiful music sound- HD sound quality, splendid music experience and smooth communication- Ergonomic earphone tip with soft silicone ear cap, comfortable and stable- Multifunctional fours switches: volume control / call receiving / music play / iOS Android- 3.5mm gold-plated L-type plug, compatible with most media devicesSpecifications:Driver unit: 10mmImpedance: 16 ohm / - 15pctFrequency response: 20 - 20000HzSPL: 88 / - 3dBMic: 42 / - 3dBCable length: 1.2mWire: TPE Function: Microphone,Multi connection function,Song Switching,Voice control Connectivity : Wired Connecting interface: 3.5mm Application: Computer,Mobile phone,Portable Media Player,Sport Package weight: 0.116 kg Package size (L x W x H): 19.50 x 11.00 x 5.00 cm / 7.68 x 4.33 x 1.97 inches Package Contents: 1 x RM - S1 Pro Earphone, 4 x Ear Cap, 1 x Pouch, 1 x Chinese and English User Manual