HQRP 21V AC Adapter for Back 2 Life Continuous Motion Massager BACK2LIFE BACK-2-LIFE MKA-482101000 HKA21-1000 B2L BLR-0601BKST Power Supply Cord PSU + Coaster HQRP&reg; Replacement AC Adapter plus HQRP&reg; Coaster; Input: 120V AC; Output: AC 21V, 1000mA; Safety Features: High Efficiency and Reliability; Automatic Overload cut-off; Automatic Thermal cut-off; Short circuit and Over Voltage protection; Low Interference & Noise; 1 Year warranty!