WAFU 019 Remote Control Lock for Tuya Bluetooth Smart Invisible Electronic Household Item Type: Remote Control LockMaterial: Zinc AlloyLock: Frequency: 433Mhz (± 50Khz)Remote Control Range: Approx. 0.5 - 15m/1.6 x 49.2ftWorking Temperature: -10 - 60℃Working Humidity: 5 - 60% Power Supply: 4 PCS AA batteries (not included) Battery Life: Use 20 times a day for about 6 months Unlocking Mode: Remote unlock /Bluetooth unlock of mobile phoneSize: Approx. 155 x 80 x 35mm/6.1 x 3.1 x 1.4in Remote Control Standard Number: 4 PCS Remote control range: Approx. 0.5 - 15m/1.6 x 49.2ft Working Humidity: 5 - 60% Power Supply: 1 x CR2032 button battery, 100mAh (built-in battery) Battery Life: Replacement every 6 months is recommended Remote Control Registration Number: Up to 20 registrations Transmission Mode: Each frequency conversion signal, to prevent replication How e: 1. Install 4 x AA batteries(Not included) into the product, you can use the remote control to unlock.2. Download the APP for "TUYA Smart", turn on the Bluetooth of the mobile phone, then plug the doodle Bluetooth adapter into the power plug, connect it with the lock using the Bluetooth of the mobile phone, and unlock the lock with the mobile phone.