1For 2.4G wireless transmission, with signal stability, it is anti-interference, and the digital keyboard and mouse share one receiver. 2This set is made of 2.4G wireless numeric keypad and mutet wireless mouse, which is practical to use. 3In scissor-foot design, you can comfortablely tap. And also it is with low-key cap design, moreover, its quick rebound speed for a more comfortable and quiet input experience. 4With 1200 DPl resolution, the mouse is compatible for WIN7 / 8 / 10 / MAC / Android system. 5Working method of mouse is optical engine, and the keyboard will enter sleep for no action in 3 minutes.Item Type: Keyboard + Mouse Material: ABS Gross Weight: Approx. 194.00g Packing Size: Approx. 16.50 x 13.50 x 3.00cm / 6.50 x 5.31 x 1.18 in Keyboard Parameters: Wireless Protocol: 2.4G Working Distance: About 10 meters in the case of barrier-free. Battery Type: 2 x AAA battery (not included) Working Voltage: DC 1.5V Working Current: 1 x Keyboard1 x Mouse1 x Receiver1 x Instruction Manual Keyboard and mouse batteries are not included.