Movable part: Movable coil type Pointer swing direction: From left to right Pointer length: 49 ±1mm, from the needle end to the axis Pointer width: 0.45 ±0.05 mm Enameled wire material: UEW polyurethane copper wire The meter placement position: Vertical Wire: 2 X 200mm#28 wires, one black and one red. They are used to solder LED positive/negative poles. The end of the wire needs 5mm of copper to be exposed for easy soldering. Backlight type 1: Two LED are connected in series "6V, 20mA", connected to a resistor, 620ohm1/2W Type 2: Two LED in series "6V, 20mA", connect a resistor, 1.3Kohm1/2W Electrical performance: Standard test conditions: Temperature 20 degree, humidity 70%. If there is no difference in the test results, it can also be carried out in a normal temperature and humidity environment. 1 Current sensitivity: The direct current required for the pointer to be at the zero scale to the position shown on the scale plate. 2 Maximum current sensitivity: 200uA ±8% of the DC current required by the pointer at the zero scale to the full scale position of the scale. 3 Internal DC impedance: 750ohm ±8%. 4 Insulation resistance: test its insulation value with a 500V DC voltage, and the insulation resistance between the meter casing and the electrical circuit is above 50Mohm. 5 Friction: After adding the sensitivity current to the meter, it is slowly reduced to zero. The error between the pointer indication position and the zero scale center is ± 1mm. Colour:As Shown Material:plastic Package Contents: 3 x Power Meter