HQRP Car Charger for SportDOG FieldTrainer 400 SD-400 SD-400S Dog Training Collar Receiver Transmitter Battery Charger DC Adapter Power Cord Coaster HQRP&reg; Replacement Car Charger plus HQRP&reg; Coaster; Input: DC 12V ; Output: DC 12V; 0.25A; Safety Features: High Efficiency and Reliability; Automatic Overload cut-off; Automatic Thermal cut-off; Short circuit and Over Voltage protection; Low Interference & Noise; Compatible with Original Battery Charger; 1 Year warranty!