Airturn BT200S-4, Wireless MIDI Controller, Page Turner, Media and Light Controller, With Bluetooth 4, Sends MIDI commands, MIDI notes, parameter changes and keyboard shortcuts, Auto-repeat, 4 Programmable steel footswitches, 7 Different function modes, 2 Coupling methods: open coupling for connection of up to 8 different devices and closed coupling for connection to a single device, Bluetooth status LED, Low battery status LED, Lithium polymer battery for up to 200 hours runtime per charge, Auto power off when tablet or computer is turned off, AirTurn Manager App for iOS, MacOS or Android, Dimensions (W x D x H): 247 x 70 x 44, Weight: 314.7 g, Includes charging cable and instructions