Features:IPX7 waterproof, suitable for running, limbing, et .4.2 onne tion, effe tive distan e of 10M. omes with 8 mAh mobile power .The power an also harge for your phone.The earpie e an be used separately and ultaneously.Ergonomi design, no worry about falling off.Get rid of the restrain of wired earphones.Des ription:Waterproof Level: IPX7 waterproofTransmission distan e: 10 metersMobile Power apa ity: 8 MAStandby time: 100 days all time: HInput: 5V/1MAHOutput: 5VFrequen y: 2.402G-2.480GVoltage: 3.4V--4.2VEarphone battery apa ity: 45MAImpedan e: 32Ω harge time: 2HWorking time: 3-5HSpe ifi ations:Material: + plasti olor: bla k, red, blueItem Size: 22*27*105mmPa kage Size: 14.5*4.3*7 mPa kage in luded:2 x Stereo In-Ear 1 x 8 mAh Mobile Power1 x Data able1 x User ManualNotes:1. Due to the differen e between different , the pi ture may not refle t the a tual olor of the item. We guarantee the style is the same in the pi tures.2. Due to different personal measuring te hniques, there might be 1-3 m error of the physi al. Thank you! a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a