This cordless keyboard mouse combo is made of , which can withstand use. Features the ABS material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. Features -Color: Black -Material: ABS -Size: 36.80X14.30X2.63cm/14.46X5.62X1.03in - Using the new 2.4G technology, there is a USB port receiver plugged into the USB port of the computer, the keyboard and mouse share a receiver. - Replace old or broken keyboard and mouse with a new one. - Note: The photoelectric sensor cannot work on the mirror or on the clean glass. - Special design and it is in fine craftsmanship. It is the best replacement for your old, broken one. - It is in stable characteristics, high performance and it is in great reliability, simple, easy to use. Specification Keyboard: - carrier frequency: 2402MHz-2480MHz - Working frequency: 16, automatic frequency hopping - Rated working current of keyboard: 28mA/3V - system: optical - Resolution: 1000DPI - Battery: 1 x AAA (not included) Mouse: - Rated working voltage of mouse: 1.5-3V - Rated working current of the mouse: 10-15mA - Mouse resolution: 800-1200DPI - working channels: 16, automatic frequency hopping - working frequency: 2.402-2.480GHz - transmission rate: 1-2M - The maximum effective distance: 6-10 meters - : 28 inches per second - Photo processing: 3000 - Mouse button life: 3 to 5 million times - Working temperature: -15 degree centigrade to 60 degree centigrade - Battery: 2 x AAA (not included) Package list: 1 x keyboard 1 x mouse 1 x USB receiver 1 x Manual