Compatible Models: MM 400, MM 400-X, MM 450, MM 450-X TRAVEL, MM 500, MM 500-X, MM 550, MM 550-X TRAVEL, PX 210 BT, PX 360 BT, PXC 310, PXC 310 BT, PXC 360 BT, VMX 200 / High Speed (5FT) 2.0 USB Cable / OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection) / 5 YEAR FREE REPLACEMENT WARRANTY /CHARGING CAPABILITY / 3RD PARTY NON OEM PARTS