Lightweight Portable: Small size, the weight of 1pc keychain light is only 7g, easy to carry around. Easy to Use: Two modes for turning on the led light, ON/OFF switch or squeeze button. Built-in Button Batteries: Powered by 2 * CR2016 lithium batteries, which was installed in the product, convenient to use. Wide Application: It can be hang on your handbags as a decoration, or as a lighting tools, key pendants, and advertising promotion gift. Great Gift Choice: Perfect for colleagues, students, friends, etc. Specifications: Shell Light Color: Blue/Green/Red(optional) Shell Material: Plastic Quantity: 10pcs Power Battery: 2 * CR2016 3V Button Batteries Item Size(1pc): 4.1 * 2.4 * 0.8cm / 1.6 * 0.9 * 0.3in Item Weight(1pc): 7g / 0.2oz Package Size: 12.7 * 9.0 * 1.7cm / 5.0 * 3.5 * 0.7in Package Weight: 74g / 2.6oz Package List: 10 * Keychain Light