Compact size (3.8 × 2.5 × 1.5in) and ergonomic design fits well in your hand. * DPI button easily adjusts the sensitivity between 3 DPI levels (1000/1500/2000). * 2.4G wireless technology keeps the connection stable at distances of up to 33ft / 10m. * Nano receiver occupies minimum space; One-step plug-and-play setup. * Package contents: Anker® Wireless Compact Mouse, 2.4G USB receiver, instruction manual. 18-month warranty and free lifetime technical support.