EasyShop.ie selects an item each day,
you did not know you needed until now :

Wireless GPS Bike Computer 2.4" Display Altitude Speed Distance Backlight IPX7 Waterproof for Road MTB Cycling

Shop Bikevee Wireless GPS Bike Computer 2.4" Display Altitude Speed Distance Backlight IPX7 Waterproof for Road MTB Cycling - Out Front Extended Mount(Black). Free delivery and returns on all eligible orders.