Made of stainless steel: provide 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 be locked outside. Remote Control Distance:10m/32.8ft. Battery Life:4 batteries last for 16 months in standby mode. Lock Tongue Moving Distance:23mm/0.90 inch. Item Size:1377737mm/5.393.031.45 inch.