Specifications Of 16 Channel Relay Board: Operating Voltage Range: 5-12V Maximum Voltage(V) : 250V AC Maximum Current(A) : 10 Supply Current (A) : 10mA Operating Temperature (°C) : -40 to 85 Opt. Relative Humidity(RH) : 20{7e82c6d62784066d1b113f595afb6e15f0ca3fec289cddd29e600df910d44428} ～ 85{7e82c6d62784066d1b113f595afb6e15f0ca3fec289cddd29e600df910d44428} Module Interface: 1. DC+: DC power supply positive pole 2. DC-: DC power supply negative pole 3. CH1~CH16: relay signal triggering pin Relay Output: 1. Normally closed pin (NC1~NC16): relay normally closed pin 2. Common pin (COM1~COM16): relay common pin 3. Normally opened pin (NO1~NO16): relay normally opened pin Package Includes: 1x Opto-isolated 16 Channel 5V Relay Module (Tested and QC-OK) Related Products: 5V 8 Channel Relay Module Board for Arduino 5V 1 CHANNEL RELAY MODULE FOR ARDUINO 6-30V 1 Channel Relay Module Switch Trigger Time Delay Circuit Timer Cycle Adjustable How to control 16 Channel Relay module using Arduino control: