Don't think I have ever done a RRP "deal" before, but its close to xmas and the cheapest buy it now on ebay is £58.50...so...
The Pokémon GO Plus is a small device that lets you enjoy Pokémon GO while you're on the move and not looking at your smartphone.
Compatible with both iOS and Android*, Pokémon GO Plus connects to smartphones via Bluetooth low energy and notifies players about nearby Pokémon and PokéStops. This accessory cannot be used without the Pokémon GO app and requires a compatible smartphone. See About below for full details.
Read more at http://store.nintendo.co.uk/merch-accessories/pokemon-go-plus/11302666.html#S5cM48B0K2GY48HK.99