A mode can be set for multiple time periods, can reach 5 time periods; With a buzzer alarm function. Additional features: Each "time period" can be set individually In the specific parameter setting interface (after the second step), press the STOP button to switch the output mode: OUT1: Start time point turns on the relay, time is off the relay OUT2: Outputs 1S pulse to start or end time In the specific parameter setting interface (after the second step), press the STOP button for a while to switch the ringing mode: BLL0: Ring disable BLL1: Ring enable STOP key function expansion: Relay enable mode: 1.ON: enable relay on; 2.OFF: Do not turn on the relay, it is always off; Press the STOP button on the time display interface to switch between ON and OFF, the current status will flash, and then return to the main interface. (This function is the emergency stop function, press once to close the closed relay) After the relay is disabled, the product can be used as an alarm clock. Sleep mode: 1. C-P sleep mode: within five minutes, without any operation, the digital tube automatically shut down the display, the program normal operation; 2. O-d normal mode: digital tube is always open display; Press the STOP button for a while after 2 seconds to release, to achieve C-P and O-d state of the switch, the current state will flash, and then return to the main interface. Colour:Blue+black Material: ABS Package Contents: 1 x unit Real time relay module (Note: Batteries not included) Note: When rings, press any button to stop the ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.