Ingenious product - a charging cable for iPhone always on a key chain to have with this, but wishes to everyone. At first glance the Chargekey of Nomad also works quite stable and robust. Unfortunately, I've had the experience at 3 different batch Keys that these are canceled within 2 weeks each on the suspension to a keyring. Unfortunately, the product is thus just ripe for the garbage dump. Also, both exchange products are again broken within 2 weeks from the federal government. For people who like to carry their keys in your pocket, the product is absolutely inappropriate. How the case is with the durability of the charge keys if the keys in a handbag or the like is transported, I can not comment. For me, anyway completely unsuitable