Got 2 of these £15 each of 2 for £25

Fully working comes with the band and charger these are £44.99 each at argos

Nuband Pulse is our brand new tracker and heart rate monitor. Follow your activity on the band and back up on the free app. Monitor and track your heart rate and watch as your fitness gets progressively stronger. Put the pulse back into your life.

Features activity and sleep tracking, heart rate and electrocardiogram and three point electrode testing.

Connectivity
Bluetooth 4 connection.
Battery
200mAh battery capacity