GPS receivers are now made waterproof, lightweight and small enough to take outdoors and provide you with a detailed record of your journey. Run units are not intended for navigation, rather as an extremely accurate way of analysing your workout giving you information on speed, distance, elevation etc. Some units offer integrated heart rate monitors.
All electrical goods sold on wiggle that come with a mains power supply are supplied with a UK plug. Please check the product description to see if any other plugs are known to be included in the box, otherwise you may need an adapter for use in your country. Most power adapters will accept 110-240 Volts.