Lamp bead 4.2A dual USB indicator light suitable for: cars RVs yachts etc

MULTIPLE PURPOSE: Can be used for mobile phones, tablets, navigation devices, GPS, car refrigerators, car vacuum cleaners, etc. use. Purpose: large engineering vehicle, battery car, motorcycle, ship etc. Refit general purpose, with 12v voltage, do not worry that the auto start voltage is too high, burnt products. Output over current protection Output short circuit protection Output voltage protection. Constant current and constant voltage reverse protection.Product Description Input voltage: 12V USB output voltage: 5 V. USB output current: 2.1 A and 2.1 A. Application: for different outputs of 12 V vehicles. Safe and reliable, easy to install.