Streamlined and ergonomics appearance design, silicone ring, comfortable to wear, not easy to fall off. USB interface, mobile power charging is available, charge two hours for about three months usage, convenient to carry out. Silicone mute button, help to complete counting work quietly 9 channel counting can record and switch 9 group data. One key lock screen prevents data loss. Reset design avoids unexpected reset and loss data. brand new and high quality Colour:black Material:plastic Package Contents: 1 x Counter Clicker Only the above package content, other products are not included. Note: Light 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.