Description: Friendly Remind : If you feel difficult or not connection, you can directly connected the positive ,negative, speed cable; headlight,left and right light can not connect. Specifications: Power supply: 48V - 72V Working temperature: -30 - +80 Power consumption: 0.3W-0.9W Pcb size: 70*40mm Screen color: white/bule Instructions:1, There is a protective film, you need to tear up the LCD before boxing. 2, Do not reverse the positive and negative power meter, please note that acro the board to avoid a conductive material, in order to avoid a short circuit occurs. 3, human safety voltage of 24V, the wiring proce, please power off (or wear gloves) operation! Battery voltage universal knowledge: Ordinary lead-acid battery is the smallest single cell voltage 2V, about undervoltage 1.75V, be full is 2.4V. for example 48V : under voltage is 42V, full power is 57.6V (It has been observed: the actual full power generally only to about 55V). Connection speed lines: Now most electric car motors are brushle motor, the speed of the current analog pointer instrument display is driven directly by the motor phases pointer coil produces a magnetic field, which in turn indicates the speed, it is our company's LCD instrument can also directly acce the original meter speed lines on the LCD display speed, the motor can also be a Hall signal lines directly connected to the motor and the motor hall leading to the Hall signal line and connect directly to the Hall of a signal, the supply of instrumentation, thus Calculations show speed, no other need for additional Hall sensor. Frequently Asked Questions (must see) 1. Q: Why does not light meter plug in to? A: There are two poible First, the buyer when the meter is installed, there is no order in the line plug replacement (meter may not be the same as six lines on the order and the car), according to the method described in the Internet and then plug in the cable to one correspondence. Secondly, some of the original car dashboard car operating voltage is 12V, and our instrument operating voltage and the battery voltage is the same (for example, a 48V battery, the instrument should be connected 48V), positive and negative re looking for a set of power very Jieshang Qu on the line. 2. Whether according to the color line to pick? A: No! National standards does not require headlights, steering, speed must use what color line, and now a lot of electric vehicle manufacturers, each has a different definition, but generally red are positive, black is negative. 3. Why not show the total mileage? A: Boot mileage displayed within 5 seconds, display a single mileage and driving time after 5 seconds! Note: 1, Photos are for reference only, the color of the product on the back of the wiring may be adjusted,and it is slightly different with the main figure. mind who take carefully 2, When direct sunlight, the color LCD screen will be reflections, this situation like our phone directly in the sun is the same effect: dark color and will be reflective. 3, Products will be updated from time to time, the circuit board layout may also be behind a slight change,But does not affect use.if not promptly update the picture, please do not mind. Package Included: 1 x Speedometer