This is used to remind the other car park owner that the lane of car parking is already reserved for the specific person where we should not park the vehicle. They are made up of solar power which is rechargeable for every three months. They should not be removed nor moved until the specific owner asked to move for. Original design of 180° two ways rocker, (The rocker with two ways protection) It's an effective way to avoid the damage which is from outside force Reminding when the voltage is shortage Automatic alarm when hit an obstacle Airtight design stronger waterproof function Two ways protection, power off automatically Strong stability, the maximum of 2 tons.