The BOSS GT-100 is a premium floorboard multi-effects processor and amp modeler featuring advanced COSM technology, dual LCD displays, and extensive signal-routing flexibility.The official technical specifications from the Roland/BOSS GT-100 Manual include: Audio Processing & MemoryAD Conversion: 24-bit + AF method (Adaptive Focus method proprietary to Roland/BOSS)DA Conversion: 24-bitSampling Rate: 44.1 kHzProgram Memories: 400 total patches (200 User + 200 Factory Preset)Dynamic Range: 100 dB or greater Connectivity & I/OMain Input: 1 x 1/4-inch phone type (-10 dBu / 1 M ohm)Aux In: 1 x 1/8-inch stereo miniature phone type (-20 dBu / 47 k ohms)Audio Outputs: 2 x 1/4-inch phone type (L/Mono, R)Phones Jack: 1 x Stereo 1/4-inch phone typeEffects Loop: 1 x 1/4-inch Send, 1 x 1/4-inch ReturnExternal Control: 1 x 1/4-inch Amp.