1) Bluetooth unlocking of the mobile phone:Based on the low-power Bluetooth technology, it can be easily unlocked through the mobile phone APP.2) Remote distribution of electronic keys:The electronic key can be sent to the tenant at any time, and the validity period of each electronic key can be flexibly set, or to freeze / thaw the electronic key.3) Unlock record and monitoring:APP unlocking keeps records. After any mobile phone APP operates the door lock,connects the network and synchronize the information, all unlocking records can be seen on the administrator APP.4)Remote Control:Support Adding TTLOCK remote control R1 and gateway G2 (after connecting to the G2 gateway, it can unlock remotely from anywhere via WIFI and support third-party intelligent platforms such as for Amazon Alexa and for Google Assistant smart voice speakers for remote unlocking control, etc.)SN-9243 Bluetooth door lock module Used to transform old electric door locks into smart locks for ttlock app unlocking.SN-9243 Bluetooth door lock module uses Tailing mini 8251 Bluetooth chip as the main control, and supports low power Bluetooth (BLE 5.0), which can be passed The App manages door locks (electronic keys) and unlocking. Door locks support firmware upgrades, and the software functions can be extended through firmware upgrades.The App electronic key can specify the validity period (start time-end time), within the validity period can be unlocked.Color: greenMaterial: ABSPackage Contents:1 x Access control controller motherboard1 x Remote controllerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.