APPLICABLE BATTERY --- digital battery monitor is suitable for 8-100V (12v 24v 36v 48v 60v 72v ) Ternary lithium battery, lead-acid battery, lithium iron phosphate battery. Default 12 volt lead acid battery.It has -off memory function.APPLICATION --- this batter tester can be used as battery voltage meter, battery capacity tester and for electric bicycle, motorcycle,golf cart,car, automotive , car, marine, RV, boat, etc.PROTECTION --- the battery detector comes with protective shell, dustproof waterproof surface; input reverse connection protection.INSTALLATION --- red wire for the positive, black wire for the negative. The wire is 39.37 inches .LCD DISPLAY --- the battery status reader adopts Blue back-light, black font LCD display , black font LCD displays battery capacity, voltage,percentage..(the screen will flash if you set a low voltage)colour:BlackMaterial:ABSsize:6 x 3 x 2cmPackage Contents:1 x Battery Monitor1 x 1m cableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.