... products with Voltage range 100V-250V.3, Maximum testing wattage: 300W.4,Testing parameters: Voltage, Current , Power, Power factor, Annual power consumption.( ... use sockets. It could test any bulbs or electrical products with power plug, and no need to connect the wire in ... holders, it could test any electrical products with wire.10,With fuse inside the power sockets, it could protect the over load ...