Features of Dr?s Finder Compact size Easy to use and move. m Rechargeable battery User doesn t need to change battery. W.L.S. function (Working Length Select) function Doctors can select own working length for operation convenient. Color OLED screen Improve user recognizing on treatment. ^ Works with smart device (option) • »i Show the measurement condition on smart device by wireless connection by with Bluetooth technology. (Android device only)