Here's a clip from the manual the seller sent me:
Timer Relay Module (FRM01) User Manual The multifunctional relay control module (FRM01), designed for the customers of different needs, micro-controller as the main control unit, preset 18 kinds of functions, and can be based on user needs, customize and add other specific functions.The module using of high-quality power relay module, high-power and high-voltage transistor, red & blue signal lights, double-sided PCB board, stable performance, can be widely used in a variety of power control occasions.
I. Module Function The user can select one of the following 18 kinds of function according to keys and display, can set and save the parameters of the 18 kinds of function, also can view the current function parameters, time parameter sets the minimum 0.1 second adjustable, more expertise.Gentle remind: Function 1-8 start automatically after power on; function 9-18 start required a high level Pulse signal trigger, and the high level duration≥20ms;function 9 is self-locking mode; function 10 is a level control mode.
[Function 1]: Timing Pull-in:after power on, when arrived the setting time T1,the relay pull-in,and the T1 can be adjustable between 0.1 second -270 hours, give CH1 interface a high pulse signal(high level duration≥20ms),repeat the above function.[Function 2]: Timing Disconnect:after power on the relay pull-in, when arrived the setting time T1,the relay disconnect, and the T1 can be adjustable between 0.1 second -270 hours, give CH1 interface a high pulse signal(high level duration≥20ms),repeat the above function.
[Function 3]: Timing Pull-in Then Disconnect: after power on, the relay don’t pull-in, when arrived the setting time T1 relay pull-in; when arrived the setting time T2 relay 格兰瑞科技TEL:0755-86030290
[Function 4]: Timing Disconnect Then Pull-in : after power on, the relay immediately pull-in, when arrived the setting time T1 relay disconnect; when arrived the setting time T2 relay pull-in, and the T1 and T2 can be adjustable between 0.1 second -270 hours, give CH1 interface a high pulse signal(high level duration≥20ms),repeat the above function