Description: I. The buzzer has two working modes: 1. It is compatible with the functions of traditional active buzzers and synchronized with the flight control drive. 2. When connected to the flight control normally, if the main battery is powered off during flight, it can still automatically emit a 100-decibel beeping sound 30 seconds after the power is off, and the LED will emit white light, which is much louder than ordinary buzzers. II. How to turn off the buzzer: Press and hold the release button for more than 2 seconds, and the YR50B_S Finder will turn off the sound. YR50B_S Finder is compatible with all BF and CF flight controls. It can work as long as it is connected to the buzzer interface of the flight control. When the flight control is wired correctly, the multi-rotor aircraft is powered on and the flight control power supply will automatically charge the YR50B_S Finder (the red LED will light up to indicate charging is in progress, the red light will go out to indicate full charging; the red light will flash quickly to indicate that the flight control is powered off and enter a 30-second waiting time). Specification: Item Name: Finder YR50B_S Size: 18*17*15MM Weight: 4g Volume: Up to 100dB Features: 1. Compact and lightweight design for easy installation and usage. 2. High-decibel BB sound alarm for quick and easy location of lost drones. 3. LED lights for better visibility and tracking even in low-light conditions. 4. Programmable settings for personalized usage and convenience. 5. Durabl construction for long-lasting performance and reliability. Package Included: 1x YR50B_S Finder 1x 3P*1.0MM Cable