The TC Electronic Flashback 2 X4 is a flagship delay pedal offering a wide range of studio-grade delay effects, including new algorithms like Crystal, Analog, and Tape. It features three MASH switches for real-time parameter control, a tap tempo function, and six presets for instant access to various delay tones. With 10 delay types and 6 TonePrint slots, users can customize their sound and store artist presets. The pedal also includes a 40-second looper and MIDI capabilities for expanded creative possibilities. The Flashback 2 X4 builds on the original Flashback pedal, expanding on the feature set to create a versatile and powerful delay machine.