This che clock is suitable for most kinds of che games. It has 42 kinds of timing rules. It is easy to operate and can be silent, provides a nice timing tool for games.Features:With countdown function, can carry out multi section countdown, positive timing function and each step delay function.It can add seconds, limit times and read seconds.Different timing parameters can be set on the left and right sides. During the competition, the timing parameters of both sides can be modified.Can display the number of che steps, can be silent, does not affect players playing che.Turn off the machine and turn it on again to keep the parameters of the game before turning it off.Big seesaw button, nice handle, quick reaction, easy to control.It has 42 preset rules, multi-function and wide ranges of application.Specifications:Material: plastics + metalBattery: 2 * AA: 1.5V, 800mAh (Delivered without batteries)Item size: 161 * 100 * 62mm / 6.3 * 3.9 * 2.4inItem weight: 245g / 8.6ouncePackage size: 150 * 100 * 50mm / 5.9 * 3.9 * 2.0inPackage weight: 400g / 0.9lbPacking List:1 * Che Clock Drop Shipping Service.1. There is no limited stock to fulfill the orders on a daily basis.2. We use ePacket shipping for most countries, such as United States, Canada, Australia, Ruian Federation, France , Spain , United Kingdom and New Zealand.3. Priority shipping, fast shipping within 48 hours.4. No invoice or receipt or promotional materials included.