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AirTurn BT500S-4 Controller. Improved version of the BT200S-4! Now with Bluetooth 5, you can get more power, speed and range from your setup. Enjoy 200+ hours of use with each battery charge, along with an even faster and more responsive experience. Foot switch control in a stompbox design that easily integrates with your pedal board. Get four switches for more control options! 

• Cue audio, lighting, and effects
• Start and stop backing tracks and metronomes
• Send MIDI commands and custom DAW keys
• Turn pages, read music, scroll lyrics and tabs
• Capture video, photos, and more!