Perfect for office, home, hotel, anti-theft door, corridor door, wooden doors, garage door, etc. Remote controls with digital conversation system, it cannot be decoded or duplicated. Anti-theft and bring you safety. Made of stainless steel, providing long service life, very strong and steady. Power saving and low battery consumption. Easy and firm installation with the external mounting plate. The bottom panel design makes installation easier and more stable. Once the main batteries are depleted, you can use the backup battery, no worries about dead battery and being locked outside. (Batteries need to be purchased separately) Features6: Remote Control Distance: 10m/32.8ft Remote controls with digital conversation system, it cannot be decoded or duplicated. Anti-theft and bring you safety. Made of stainless steel, providing long service life, very strong and steady. Power saving and low battery consumption. Easy and firm installation with the external mounting plate. The bottom panel design makes installation easier and more stable. Once the main batteries are depleted, you can use the backup battery, no worries about dead battery and being locked outside. (Batteries need to be purchased separately) Remote Control Distance: 10m/32.8ft Color: Silver & Black Material: Stainless Steel Package Contents: 1* Remote control Lock 2* remote control 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.