TBOS-BT4LT - Four Station Bluetooth Battery-Operated Irrigation ControllerRain Bird TBOS BT4 Four Station Bluetooth Battery Operated Irrigation Controller The TBOS BT 9V Battery Controller provides commercial level irrigation control that you can program with your smartphone via the free Rain Bird mobile app. Install the controller in street and highway medians, roundabouts, or anywhere you need irrigation control but do not have AC power. The vandal proof case makes it ideal for public or high foot traffic areas. With the