Features Exclusive power source for drone GPS, just turn on this unit to get satellites lock without powering up your VTX or FC, no more over-heating or burning up your VTX/Vista/AU. Keep the GPS always on, it never looses power until the switch is turned off, so the pilot never needs to get another fix for the whole session. Recharges during normal use, no need to charge it separately, it can be recharged when you are flying the quad. 3.3V/5V GPS switchable. It can work for both 3.3V and 5V GPS unit, select it simply via the switch. Acts as a lost model buzzer, VIFLY Finder 2 function is embedded that it can work as a standard buzzer or individual beeper when quad battery ejected. Specification Weight: 3.5g Size: 26 X 20 X 8 mm LiPo Voltage: 3.7V LiPo Size: 50mAh Buzzer Working Time: Up to 4 hours Input Voltage: 4.5-5.5V Charging Time : 1.5 Hours Output Current : Up to 80mA Buzzer Volume : Up to 90dB