1. Smart lock for indoor doors, remote management and unlocking by TTLOCK APP, no key required 2. Punch-free installation: no tools are required, and the original door lock does not need to be removed. You only need to use the adhesive sheet to fix the product on the inside of the door and put the knob on the original door lock. The strength of the adhesive sheet can also withstand daily use 3. Material: ABS+aluminum alloy 4. Dimensions: 111.6 x 59 x 73.2mm 5. Power supply: CR123A battery x 2 6. Battery life: about 6 months 7. Usage environment: indoor only 8. Support system: iOS 11+, Android 5.0+ 9. Communication method: Bluetooth 5.0
