Eddystone Clip-On LED Light

From Ultimate Performance

You can't do enough to ensure you are safe and can be seen as the nights draw in and this slim and lightweight LED light will clip easily onto your clothing, belt or bag to enhance your visiblity up to half a mile away and act as a warning signal to other road users. It is the perfect accessory for evening or early morning runs during the winter months when light is restricted. Also suitable for cyclists and walkers, it has two modes that can be selected at the touch of a button and a long battery life, up to 144 hours when flashing or 72 hours in constant mode.

144 hours usage in flash mode,72 hours of use in constant

Manufacturer's description, supplied via the retailer feed.