TDS-3380 Roller Shutter Lock w. Wireless site alarm

1. Convenient, Locking Automatically without any keys;

2. Stronger ability of anti-theft or against strong breeze, with double lock hook design;

3. Alarm automatic activates once door broken or lock-opened illegally;

4. Without any welding, easy to installation or remove by yourself;

5. Patented Product, pass SGS test and used as designated lock by banks & superstores in China.