ITEM NAME:4.5-6V Aluminum Motor Servo Tester ESC Checker for RC Upgrades and Accessories Description: High Precision Servo / ESC Tester for Remote Control Models RC Airplanes Detect various servos. Can connect ESC, detect the operating state of ESC and motor. It can also connect 3-pack ESC or servo, single chip control, has good stability and high precision. Pulse width adjustment method: automatic/hand adjustment/automatic SUB trim signal output Specification: Output: ≠¤15mA (5.0) Input: DC 4.5-6V SUB trim output signal: 1.5ms ±0.5ms Weight: 8g Pulse width adjustment method: automatic/hand adjustment/automatic SUB trim signal output Power supply: 4-5 AA battery, BEC/UBEC(do not need power supply with built-in BEC servo) Size Chart: Size: 42.5x23.5x24mm / 1.67x0.92x0.94inch Package Includes: 1 Piece Servo Tester ESC Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you! SKU: FUZ0028365861019428.1 Piece Servo Tester ESC. Output: ≠¤15mA (5.0).