The Schumacher Electric Schulink Wireless Charger, No. SPC3, is a 3-amp connected charger that can sync to a smartphone or tablet when paired with the Schulink App. Users can wirelessly monitor and control the charger from any location. Schulink monitors clamp connection, AC connection, on/off status, battery condition, battery voltage, charger temperature and each stage of the charging process. The charger/maintainer features auto-voltage detection and multi-stage charging for added precision, safety and battery life. Scrolling digital messaging provides step-by-step instructions to properly charge a battery.