Before installation, please note:
1. Do not exceed 1cm distance between the door sensor and the magnet part.
2. We recommend installing the transmitter at about 4.9 - 5.9 ft (1.2 - 1.7 m) above the ground.If there is a metal door, rebar concrete wall or ceiling between the transmitter and receiver, the distance of the radio waves will be extremely short and may not work.
3. Electromagnetic waves such as equipment will affect the operation of the receiver, so please keep it away from that near it.
4. Please understand that the wireless range is different due to the environment.
5. If you have an electrical outlet, the receiver can be installed anywhere and it is recommended to install it on the wall outlet.
This product is not a toy, please keep it away with your children.