Features: 100% brand new and High quality 2.4GHz Wireless Connectivity (USB receiver & rechargeable mouse usb cable included) Built in rechargeable battery Ergonomic designed to remit and prevent carpal tunnel syndrome. Optical laser technology for precise control User convenience with wow-pen's signature, pen-grip comfort. L/R mouse buttons, 2 thumb buttons, and a clickable scroll wheel Specifications: Item type:Ergonomic Optical Mouse Model:WP012 Resolution: 1600dpi Dimension:101X102X72mm Maximum operating range:10m Charging cable Length:50.5cm Material:Plastic System Requirements:Windows 98/Me/2000/XP/Vista/Win 7/Mac The Symptoms of "mouse hand": Since the keyboard and mouse have a certain height, the wrist have to dorsiflexion to be an angl , then the wrist will keep the tension for a long time which will compress the nerves blood vessels in Carpal tunnel, so that nerve conduction is blocked at the same time blocked the blood supply, resulting in the barrier between your palm feeling with movement. Mainly for the gradual emergence of hand numbness, burning, night intensified the pain, often woke up in dream. Maybe the 'mouse hand' occurred while happening the following symptoms: the palms, fingers, wrist, forearm and elbow stiffness, pain, discomfort. hand tingling, numbness, coldness. lower Interoperative capacity of grip strength and the other parts of hand. the pain can be persistent to the arm, upper back, shoulder and neck. Package include: 1x Vertical USB Optical Wireless Mouse 1x USB receiver 1x Charging cable
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