Muvit I/O Health Tensio Lite Activity and Sleep Tracker Black: Amazon.co.uk: Sports & Outdoors
3Plus Vibe Lite Smartwatch Built-in Fitness Tracker with Heart Rate and Blood Oxygen Monitor,Sleep Monitor IP68 Waterproof HD Color Touchscreen for Men Women Compatible : Amazon.co.uk: Electronics & Photo
Fitbit Versa lite Wearable Smartwatch Fitness Activity Tracker (S & L Bands)