Feature: 1. Small Size: Light weight, microprocessor control, strong anti interference ability. 2. Super Loud Buzzer: Alarm sound greater than 85db is enough to attract your attention, and you can easily find RC aircraft based on alarm sound. 3. Two Modes of Alarm Sound: When the model aircraft loses its signal, there will be an audible alarm. 4. Simple Operation: It can be connected to any standard steering gear channel, connected to the steering gear and receiver for power supply. 5. Applicable Model: Suitable for RC model airplane (for AM/ PPM or /PCM remote control equipment). Specification: Item Type: Model Aircraft Buzzer Finder Weight: 4.5g/0.2oz Material: Electronic Components Applicable Voltage: 4-6V Product Size: Approx. 17x17x10mm/0.7x0.7x0.4in (without Cable) Application: RC Model Airplane (for AM/ PPM or /PCM Remote Control Equipment) Package List: 1 x Model Aircraft Buzzer Finder How to use: Connect to the servo and receiver to supply power.