Any questions please ask and I will be happy to help. Well made item and excellent value for the price. What's in the box? Xoss G+ computer, bar or stem mounting clip, rubber seat for the mounting clip, two rubber straps for the clip, Micro USB lead for battery charging, quick start instruction leaflet. 500mAh Lithium ion rechargeable giving a Battery life of 25 hours continuous use. Simply install the app on your phone with the same email as you use for Strava, switctch on the G+ and off you go. Auto pause, IPX7 Very easy to set up and connect to the app and hence Strava. Other features include. Will also connect with ANT+ speed sensor which you can calibrate to your wheel size. Will also display Cadence and heart rate(current, average and maximum) when connected to external ANT+ sensors (not supplied). Integrates very easily with Strava via the free XOSS app on your smart phone.LCD screen displays the following selectable functions: Speed, Maximum speed, Average speed, distance, odometer, elapsed time, clock time altitude, gradient. It is a good quality product packed full of features but at a price that won't break the bank.