. Measure your Throws in MM / inch / degrees. Bluetooth.Oled Display. IOS and Android supported. rechargeable no cables needed! Build in Lipo cell up to 1 hour. no Binding needed / instant connection!. very small! Length 47mm x Width 24mm x High 14mm. Recharge thru USB C Cable.. Upgradable. you can use up to 4 units at the same time on Apple IOS and maximum 2 AT Wizards on your Android.