Compatible with VeriFone: 3730, 3730LE, 5100, Vx510, Vx570, Vx610, 5750C, Vx810 Duet, VX680, VX680T, VX520, VX670, 560m, 5150. Output: 9V 4A. So, Why Buy from TeKswamp?. We thoroughly test our adapters for broken or twisted wires and properly working power jacks.