Office desktop with fast response wired keyboard .This design is suitable for the radian finger touch, high quality plastic materials, feel comfortable and more delicate to the right and left hand. Waterproof design is close to the chip. A large drainage holes at the bottom of the keyboard, the keyboard will not cause water short circuit may, let your keyboard more long life.It powered by 2 AAA battery ( not included ) Material: ABS Type: Keyboard wired Version: Not Supported Connection: Wireless Interface:, No Key Number: 104 Keyboard Lifespan ( times): 3,000,000 - 5,000,000 Response Speed: 2.4G Keyboard Type: Virtual Package size (L x W x H): 46.00 x 12.00 x 2.80 cm / 18.11 x 4.72 x 1.1 inches Package weight: 0.510 kg Product size (L x W x H): 38.00 x 12.00 x 2.50 cm / 14.96 x 4.72 x 0.98 inches