Shipping is free, excluding Hokkaido and Okinawa Prefecture. We have many other products as well. Please take a look if you like (**). #HD Products 【Unlock Modes】 Remote control unlock and key unlock. Use the system and remote control in conjunction; only remotes with successful codes can unlock the lock, and each lock can be matched with multiple remotes. When unlocking with the remote and closing the door, it will lock after 3 seconds (if not closed, it will not lock). 【Low Voltage Lock Protection and Alarm Sound Prompt Function】When the battery voltage is low and the power runs out, the remote control cannot lock the door (the remote control cannot lock, and it will sound 4 alarm tones). However, the remote control can unlock normally. You need to replace the backup battery in a timely manner. 【Anti-theft Performance】Anti-technical opening, anti-master key unlocking, anti-card unlocking, and anti-violent damage. Password level: Converted to encrypted digital signals, which cannot be decrypted. 【Product Specifications】Remote control distance: 0-20 m; Operation times: 300,000 times; Power supply: 4 AA batteries (sold separately), emergency power supply for remote control; Battery life: Approximately 1 year; Unlock current: 120 mA; Operating environment: Temperature: -10-80℃, Humidity: 20%-80%; Package weight: Approximately 986g. 【Package List】1 * Lock (body and lock tongue, built-in 23A 12V battery), 1 * Screw bag, 4 * Remote controls (built-in button batteries), 1 * Installation tool pack, 1 * Wireless WIFI nut, 1 * Manual.