If you have moved / moving between US/UK these are a must to keep all your existing electrical items. Simran brand model AR 5000. $200 new. Converts large power items e.g. vacuum cleaner, coffee machine , toaster. Two 220v sockets and Three 110v sockets - 50

Also available:
Step Up/Down Simran Voltage Transformer Convertors
2 x 100w - 10 each
2 x 500w - 15 each
2 x 1000w - 25 each