Founction: Waterproof, Noise Cancelling, Microphone, Music play/pause, connect/hang phone, reject call, up and down song switching, binaural HD call. Waterproof: Waterproof care ( Sweatproof,rainproof,splashproof.Can't use for diving,shower etc.) Connection method: single/double free to use Working distance:About 10m Charging input voltage:5V Charging case capacity:2000mA Charging Time:1-2 hours Standby time:About 120H Talking Time:3-4 hours (1 time full ) Music time:3-4 hours (1 time full ) Colour:B:As Shown Material:Plastic+abs Package Contents: 2 * wireless earphones (left and right) 1 * charging box 1 * charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.