For automotive tools you can trust, look no further than the Schumacher Pro line of battery chargers and maintainers. The Schumacher Pro 2 Amp 6-Volt/12-Volt Battery Charger and Maintainer 2-Pack Bundle delivers 2 Amps of power to charge and maintain 6-Volt or 12-Volt batteries. Each of the two included chargers and maintainers is perfect for keeping your car, boat, and power sport batteries fully charged and in top condition. Fully automatic and microprocessor controlled, each Schumacher Pro SPR1627 charger and maintainer automatically detects the voltage of the connected battery and adjusts the amperage rate during charging and maintaining. The units also feature multi-stage charging and float-mode monitoring for optimum battery health and extended battery life. The Schumacher Pro SPR1627 2-pack bundle also features clamp and ring terminal adapters, easy-to-use controls, LED indicators, and quick-connect harnesses.