Test environment: temperature 20 Celsius, humidity 70 Celsius Overload: Input five times the current of the vine scale every 5 seconds, this action is repeated 9 times, 0.5 seconds per second Vibration: The meter is packaged and fixed on a vibrating machine. Vibration frequency: 16.7Hz (1000 times/min); amplitude 14.5mm, 3 minutes in X, Y, and Z directions Drop: The meter is packaged and dropped from a height of 30cm on a wooden board of 3cm thick. X, Y, and Z directions once each Durability: 1,000,000 times correction point current on and off Operating temperature: Work for 2 hours in an environment of -10 Celsius± and keep the current at the calibration point on and off Work for 2 hours in an environment of 70 Celsius±3 Celsius and keep the calibration point current on and off Terminal temperature: Tensile force: Acting on the terminal with a force of 10 for 10 ± 1 second Tension: Acting on the terminal with a force of 2 for 10±1 seconds Bending strength: Fold 90° in the positive and negative directions at the same position of the terminal with a force of 5 Heat resistance: wave soldering: temperature 260±3 degrees Celsius, time 5 seconds, immersion depth 1.6mm (distance to PCB bottom ) Specification: Sensitivity: 180uA±10% Friction: ±1mm Zero position: ±1 White LED: 2.8-3.8V 20mA Colour:Black + Yellow Material:Zinc cupronickel Size:3.5x3.7cm Package Contents: 1 x VU meter Only 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.