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 or FM PPM or FM or PCM remote control equipment).Specification:Item Type: Model Aircraft Buzzer FinderWeight: 4.5g or 0.2ozMaterial: Electronic ComponentsApplicable Voltage: 4-6VProduct Size: Approx. 17x17x10mm or 0.7x0.7x0.4in (without Cable)Application: RC Model Airplane (for AM or FM PPM or FM or PCM Remote Control Equipment).Package List:1 x Model Aircraft Buzzer Finder