Robodo Solid Relay Module 4 channel 5v low level trigger for Arduino Electronic Components Electronic Hobby Kit

"Specification: Voltage Supply: 5V. Channels: 4 Channel . - Switch Max frequency: ?5KHz. - Static Current: 0mA. - DC +: positive power supply (by relay voltage power supply). - DC-: connect power negative. - CH1: 1 relay module signal to trigger the end (high level trigger effective). - CH2: 2-channel relay module signal to trigger the end (high level trigger effective). - CH3: 3-channel relay module signal to trigger the end (high level trigger effective). - CH4: 4-channel relay module signal to trigger the end (high level trigger effective). Trigger Voltage Range: - 5V Low-level trigger module: 0-1.5VDC relay connect (ON), 2.5-5VDC relays disconnect (OFF). - 12V low-level trigger module: 0-4.5VDC relay connect (ON), 5.5-12VDC relays disconnect (OFF). - 24V low-level trigger module: 0-8.5VDC relay connect (ON), 10-24VDC relays disconnect (OFF). "