This password keypad is perfect for folding doors, allowing hinged door openers to be equipped with access control. Its left and right arrow buttons make it ideal for both left and right-opening doors. Its waterproof design ensures durability, while its compact size makes it practical. No need to fumble in the dark! An integrated LED light illuminates the keypad, making it easy to unlock your door at night. Forget your remote? Simply enter your password for convenient access. Specification: Power Supply: CR2032 lithium battery (230 mAh) Battery Life: Approximately 2 years (based on 10 uses per day) Working Frequency: 433.92 MHz +/- 75 kHz Transmission Power: Approximately 1 MW Encoding Format: Rolling format Standard code Operating Temperature: -20 ℃ ~+55 ℃ Password Digits: 0 to 8 digits Transmission Distance: 50 meters in open space; 35 meters indoors Protection Level: IP56 Dimensions: 85 × 75 × 35 mm Note: All data is measured manually. Please allow for a 1 to 3 cm error due to differences in lighting and display. There may be color differences; please refer to the actual item received.