Wireless Keyboard: This wireless smart door lock opener enhances your home security system; its advanced design and robust construction provide keyless entry while strengthening home security. Superior Security: The dual-channel transmitter activates only upon receiving a compatible code, and its advanced rolling code technology ensures the code sent changes every time the keyboard is used, resulting in superior security. Strong Signal: This keyboard boasts a range of 656 feet (approximately 200 meters) in open environments and 115 feet (approximately 35 meters) indoors; its strong signal ensures quick connection to any 433.92 MHz CO-Z access control system. Durable and Reliable: Constructed from rugged, high-quality material, it provides years of reliable service, rain or shine Color: Gray-Blue Material: Metal+Plastic Package Contents: 1 * door lock panel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.