package included:<br />1 x flash module controller box<br />1 x tape<br /><br />specification<br />color:black<br />size:48*25*12mm<br />working voltage: 12v<br />black wire -- negative pole; red wire -- positive pole<br />output wattage: 20w<br />maximum current input: 2a<br />universally fits any 12v car・ suv・ trucks and more.<br /><br />feature<br />1.100% .<br />2.installation is very easy・ simply tap this controller module box in-between the brake light and the wiring harness and that's it.<br />3.can alert the vehicles behind you to stop:this flash strobe controller add-on allow you to convert the vehicle brake lamp to quickly strobe for 3 times then flash for 3 times and then constantly light up. this strobe/flash feature alert the vehicle behind you to prevent any rear-end collision.<br />4.compatible with all types of brake lights including led clusters・ as such: cars・ motorcycles・ tanks・ armored vehicles・ electric bicycles and other lights<br /><br />note:<br />1.we provide clear pictures・ measurements where possible. please check as much as possible to make sure the item is the one that you need.<br />2. please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm)<br />3. instruction is not included.