Sunforce (50104) 4W 12V Solar Battery Trickle Charger with OBDII Connector Bypass diode minimizes power drop during shade Shatterproof tempered glass for superior durability Easy to install and maintenance free Includes: 12 Volt DC plug, alligator battery clamps, suction cups to easily mount the solar panel to the vehicle's windshield and OBD II connector No main power or wiring required