Usage Tips:Mini Digital Lcd Electronic Finger Ring Hand Tally Counter 6 Digit Rechargeable Counters Clicker-bl f26Streamlined and ergonomics appearance design, silic 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.Silic mute button, help to complete counting work quietly9 channel counting can record and switch 9 group data. key lock screen prevents data loss. Reset design avoids unexpected reset and loss data.nd and Colour:blackMaterial:plasticPackage Contents:1 x Counter ClickerOnly 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.