Features: 1. 100% brand new and high quality 2. RC lost Air plane finder helicopter Parkflyer tracer glider Aircraft Alarm 3. Connect the alarm between the servo and the receiver, i.e. act as a servo extension cord. 4. Turn on your TX. and you will hear 2 x beep sound. 5. Do not move any of the control stick on the TX or simply turn off the the TX. You will hear a continuous beep sound after 1 minute. It will stop once u turn on your TX or move the control stick. Specification: Condition: 100% Brand New Item Type: Aircraft Finder Tracer Alarm Using Instruction: Connect the alarm between the servo and the receiver, i.e. act as a servo extension cord. Turn on your TX. and you will hear 2 x beep sound. Do not move any of the control stick on the TX or simply turn off the the TX. You will hear a continuous beep sound after 1 minute. It will stop once u turn on your TX or move the control stick. If you ignore the continuous beep sound for around 2minutes,the beep sound will change the a louder V sound. You need to disconnect the alarm from the receiver in order to switch of the alarm. MAKE SURE THE CORRECT POLARITY BEFORE TURN ON THE TX Package Include: 1 x Aircraft Finder Tracer Alarm .