ERGONOMIC BLUETOOTH & 2.4G USB MOUSE: This ergonomic mouse has two connection modes Bluetooth 4.0 and 2.4G USB receiver (the receiver is on the underside of the mouse). With just one button you can control two devices at the same time and switch freely between Android, tablet and Mac MODERN ERGONOMIC DESIGN: The ergonomic design puts your hand in a natural handshake position and offers your wrist maximum comfort. Concave area for thumb and extended lower edge for wrist support, smoother movement and more comfortable grip. Effectively reduces wrist strain and pain QUIET CLICK & ADJUSTABLE DPI: Quiet clicks relieve you of the worry of disturbing others and keep you focused while you work, provide a better user experience. With 3 adjustable DPI 1000/1600/2400 you can easily change the cursor sensitivity depending on the activity and follow it more fluidly on a variety of surfaces WIDE COMPATIBILITY: The bluetooth mouse supports bluetooth enabled devices with Windows / Android / Mac OS system. 2.4G wireless mouse supports all devices with USB port. Suitable for PC, laptop, mobile phone, Mac. Added forward / backward buttons make browsing web pages easier. (NOTE: The forward / backward buttons do not work on the Mac) SCOPE OF DELIVERY & WARRANTY: 1 * ergonomic mouse, 1 * USB receiver, 1 * user manual. 2.4G & BLUETOOTH MOUSE This ergonomic mouse has two connection modes: Bluetooth 4.0 and 2.4G USB receiver. With just one button you can control two devices at the same time and switch freely between Android, tablet and Mac. WIDE COMPATIBILITY The bluetooth mouse supports bluetooth enabled devices with Windows / Android / Mac OS system. 2.4G wireless mouse supports all devices with USB connection. Suitable for PC, laptop, mobile phone, Mac. ERGONOMIC DESIGN Compared to traditional mice, this ergonomic vertical mouse does not squeeze the nerves on the hand, which reduces wrist pressure and the risk of cramps. QUIET CLICK & ADJUSTABLE DPI Quiet clicks take the worry out of disturbing others and keep you focused while you work. With 3 adjustable DPI levels (1000/1600/2400) you can easily change the cursor sensitivity depending on the activity. FORWARD AND REVERSE KEYS The added forward / backward buttons make it easy to browse websites. NOTE: The forward / backward buttons do not work on the Mac PERFECT MOUSE Bluetooth version: 4.0 Key life: 3 million times Dimension: 138 * 75 * 68mm DPI level: 1000/1600/2400 DPI Battery: 1 * AA (NOT included)