Hi. Whatever you do don't buy one from Cactus in North London. Ours never did work, we got no service what so ever from the company and on confronting the Managing Director at LIBS were told in no uncertain terms that they "were not interested in our petty little complaints". £1000 out of pocket and no come back what so ever. If we ever see him in our marina we'll hoist him up the mast by his dangly bits! And we're not the only ones. Give this company a wide berth!