Fangrui Product Details Effectively Manages Power To Stable And Prolongs Service Life Of Fpv Flying Glasses. The Power Management Module Is Highly Versatile And Easy To Install. The Integrated Belt Clip Can Be Easily Installed On All Types Of Fpv Flying Goggles. The Power Supply Range Is 2-4s And Is Suitable For More Than Of Fpv Flying Goggles Currently On The Market. Used On Fatsharks Full Range Of For Fpv Goggles, It Can Detect And Grasp Battery Status At Any Time, And Can Set Low-voltage Alarms. Equipped With Power Management Function, It Can Regulate Power Output To Protect Device From Overloads Shortcircuits. Stable Power Output Ensures That For Fpv Flying Glasses Work Stably And Not Affectedd By Voltages Fluctuations. Function: 1. Provide A Main Power Switch For Fpv Flying Goggles. 2. Real-time Digital Display Of Battery Voltage. 3. The Battery Low Voltage Alarm Can Be Customized With A Button (similar To The Sound Of A Model Aircraft). 4. Provide A Standard Fat Glasses Fan Power Interface, (note: This Interface Is T