1. COMPACT DIY MODULE: This brushless motor speed regulator test module features a small 19*12mm PCB board design, making it for various DIY projects. The compact structure allows for easy installation and maintenance while providing convenient testing capabilities for your electronic applications without cumbersome remote control setups. 2. WIDE VOLTAGE COMPATIBILITY: Designed with a builtin stepdown circuit, this rotary potentiometer supports DC 3V 26V power input (recommended 16V) and can be directly connected to 1S/2S/3S/4S/5S/6S batteries. The versatile power range makes it suitable for multiple electronic devices and testing scenarios. 3. PRECISE CONTROL FUNCTIONALITY: With signal input support, this module offers accurate speed regulation for your brushless motors. The integrated knob allows you to manually adjust speed settings, detect virtual positions, and observe jitter without needing additional remote control devices for testing and adjustments. 4. SIMPLE OPERATION: This tester functions as a 'manual receiver' with straightforward wiring and operation. Connect it to electronic speed controllers (ESC) for brushless systems to perform manual speed regulation, eliminating the need for complex remote control and receiver connections during testing.