Water Operating Voltage:48 Volt Battery Status: The battery indicator has 10 colored LED's that display the batteries charge. When the batteries are fully , the 10th LED light illuminate Green. As the batteries discharges, successively lower LED's light. The 9th, 8th, 7th, 6th, 5th, and 4th are all Green LED's. At approximately 30% battery life, the 3rd LED illuminate in Yellow as a caution indication of a lower battery. At approximately 20% battery life remaining, the 2nd LED illuminate as a Flashing Yellow light. When the battery discharges to approximately 10% remaining, the 1st LED to Flash Red light with the 2nd Yellow LED alternatively flashing. It is strongly recommended to recharge the batteries when you get to the 3rd Yellow LED, this is a safety precaution to avoid dead batteries. As always, this is not a fool proof device and no is made that your batteries are in good condition. Colour: black Material: plastic Size: about 53x24x28mm Package Contents: 1 x LED Battery Indicator Only the above package content, other products are not included. Note: Light reflection 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.