This is a USB adapter for you Visor Sign
Simple use in the vehicle USB port and away you go.
This is a 5v step up adapter to 12v to power the signs.
Input voltage: DC 5V
Output voltage: DC 12V
Max input current: 2A
Max Output current: 750mA - (( Our Safe Responder X Visor signs are 0.7mA ))
Cable length: 80cm USB to Power Cable