Power display function: 2-6 cells Lipo battery voltage display . 3 lines signal output function : Set manual knob mode ; automatic wiper mode ; the key step mode . Multiple signal output formats: Conventional analog servo signal format ; digital servo signal format ; Custom signal format. Pulse measurement function : It's used to test servo signal parameter output from receiver etc. equipment. Servo speed testing function : This function is used to test servo test which is help customers to choose appropriate servo for planes Servo endurance testing : This function mainly tests the endurance of servo Chinese & English language interface display with 128*64 resolution the TL80 delivers excellent clarity Three point testing Mobile phone charger port add-ons. Colour:Black Material:plastic Package Contents: 1 x TL80 RC Servo 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.