I ordered a waterproof tracker. It arrived without a charger & no instructions how to charge it. I specifically bought it to measure swimming distances. Within half an hour in the pool it started continuously buzzing & hasn't stopped since. It was advertised as waterproof & reduced from £119.95 down to £19.95 in the January sales. There's no way anyone would pay £120 for this. It worked okay at tracking steps but that's about it. Like the saying says: if it looks too good to be true, it probably is.