Keyes 12V 8-Channel Relay Expansion Module w/ Optocoupler isolation - Red + Blue<br />1， the relay uses loose music relay， output contact capacity 10A 250VAC， 10A 30VDC， easily used in home appliances or industrial.<br />2， relay modules: 12V<br />3，8 Road are active high， means pulling high-level relay<br />4， each relay has normally open and normally closed contacts<br />5，8 Road uses opto isolated， safe， reliable， high noise immunity<br />6， you can select the relays and TTL common ground or no common ground by a jumper <br />7， with a power indicator. 8 Each has a status indicator<br />8， can absorb diode protection with the relay coil<br />9， circuit board size 140 * 55 * 18mm， mounting hole size 133mm X40mm<br /><br />Octal Relay Module red<br />Static bag * 1<br /><img src="http://img6.eachbuyer.com/x9/p100/eb5235_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5235_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5235_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x9/p100/eb5235_4.jpg" />