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.
Step1 - Connect the alarm between the servo and the receiver, i.e. act as a servo extension cord.
Step 2 - Power transmitter and buzzer will beep twice. Do not move the control sticks  or simply turn off. You will hear a continuous beep sound after 1 minute. It will stop  once
Step 3 - After 1 minute the buzzer will continually beep. After 2 minutes the buzzer will sound continuously. Disconnect to switch alarm.
Note - Ensure polarity before powering receiver.

Specifications:

• Used for: Air Plane/Quadcopter/Helicopter/Glider
• Quantity: 1Pcs
• Package size: 3 * 2 * 1cm / 1.2 * 0.8 * 0.4in
• Package weight: 6g / 0.2oz

Package Contents:

• 1x RC Tracer Alarm for Lost Models