1. PCB board size: 90.8 x 85.6mm (0.3mm), adopts FR-4-1.6MM dual-panel design 2. The capacitor uses a 450V/68uF high-frequency low-resistance capacitor for power supply (temperature resistance of 105°C) 3. The motor speed regulation range can be achieved through the on-board potentiometer: 0-100% maximum speed. 4. Universal 5-wire DC 310V brushless motor test/speed regulation/aging. 5. Module integrated input surge protection, high voltage release, negative temperature anti-overshoot, motor 15V short circuit protection 6. This module has been provided to the motor factory for motor aging testing, and the test has been optimized and OK. 7. Use terminals with cover, the input voltage is compatible with AC input AC110V-AC220V (50HZ/60HZ), which is suitable for DC165V-DC310V motors. 8. The motherboard integrates a high-voltage release resistor. After power is cut off, the high-voltage power stored by the capacitor be automatically released (the power indicator light can be turned off). 9. The motherboard is designed, produced, tested, packaged and shipped by yourself. Use the fixture to test it yourself to that there are no problems. (The shipped are without cables) Color: As Shown Material: PCB Package Contents: 1 * Air Conditioner Fan Tester 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.