Features 1、JOG MODE: Support jog mode, press the button to close the relay, and release the button to disconnect the relay, which is quick and practical 2、SELF LOCKING MODE: Support self locking mode, press the button once and the relay is closed, press the button again and the relay is disconnected, which is very convenient and safe 3、LEARN 50 SETS OF REMOTE CONTROLS: This module can learn up to 50 sets of remote controls. If there are more than 50, it will cover the remote control learned earlier 4、SUPPORT CLEARING DATA: Press the button eight times quickly, the red light flashes 6 times after releasing, the flashing is completed, the data is successfully cleared, and the remote control learned before will no longer work 5、WITH SHELL: Working voltage for 5V, equipped with a shell to protect internal components, easy for you to save and carry Specification Item Type: Relay Module Board Size: Approx. 53 x 22 x 17mm / 2.09 x 0.87 x 0.67in Shell Size(excluding protruding parts): Approx. 63 x 36 x 21mm / 2.48 x 1.42 x 0.83in Package List 1 x Relay Module 1 x Shell