Filled his role perfectly (waterproof, very solid, good quality Gps, very good fixation, good value, autonomy of about 5-6 hours). I removed one star because impossible to connect to battery (must purchase an accessory 80 euros for ca ...) ... no headset (again it is a minimum of 100 euros optional) and shame it is always the same pattern revisited for 5 years (supposedly very strong but a little big to put in a pocket). Apart from that, it's all good.