Discover how things work, learn core STEM concepts, program with drag-and-drop code blocks and develop problem solving skills. The Tesla Kit: Bluetooth Edition lets anyone program wirelessly with drag-and-drop code blocks. Build projects right from your iPad and dive into the world of electronics and programming. This kit contains: Rechargeable Battery, Bluetooth Microcontroller, Buzzer · Light Sensor, Momentary Switch, 5k Resistor, Wire Blocks (7), Micro USB Cable, Free iOS App Included.