There are three main methods to program the EH-907.
If you have a manual with a code list, you can enter the digits directly: until the light stays on. 3-digit code chunghop eh907 manual full
Press and hold the button and the 0 button simultaneously for 3 seconds. The indicator light will flash twice to confirm the reset. There are three main methods to program the EH-907
This is the most reliable method.