With its eye-catching colors and patterns, M500 Silent offers variety to suit every taste and environment. M500 Silent transmits using Rapoo's latest and powerful multi-mode wireless ? via Rapoo?s reliable 2.4 GHz wireless transmission, Bluetooth 3.0 or Bluetooth 4.0. (Smart) ? allowing you to connect simultaneously to up to 3 devices and change (pair automatically) among them. Naturally this mouse also features a fully adjustable 1600 DPI HD sensor and non-slip scroll wheel, making surfing and clicking a joy. The functionality is further boosted by a ?silent click? feature, which gives you freedom and a piece of mind since disturbing those around you is no longer a concern. To top it off, M500 Silent offers up to 12 months? battery life. Multi-mode wireless connection: connect via Bluetooth 3.0, 4.0 and 2.4 GHzUp to 10 m range and 360 degree coverageConnect simultaneously to up to 3 devicesInstantly switch among 3 connected devices in one click (Automatic pairing)Silent clickAdjustable 1600 DPI HD sensorNano USB receiverCompatibility - Windows XP/Vista/7/8/10, USB portUp to 12 months battery life, Warranty - 2 YearsBox ContainsMulti-mode Wireless mouse, Nano USB receiver, 2 AA alkaline batteries (installed), Quick Start Guide