The G1 FOUR offers 60 built-in effects 13 amp models for the simulation of classical configurations 5 effects can be used simultaneously and chained in any order Looper function for audio recording of up to 30 seconds / 64 beats in CD quality with transparent start and end of loop ZOOM Guitar Lab software for creating, editing and managing effects and sounds 68 built-in rhythmic patterns that can be used in conjunction with the looper 50 memories for the conservation of sounds created by the user The exchange function makes the sound organization a breeze Auto save function for all tone parameters The preset function allows you to choose the future sound silently while keeping the current operational The built-in chromatic tuner supports all standard guitar tunings, including open tuning and drop tunings The input jack accepts a standard mono guitar cable (passive and active instruments supported) Auxiliary input jack for connecting personal music players Output jack for connection to an amp or headphones Backlit LCD display with contrast control for excellent readability even in dimly lit places Light and small enough to fit in your stage bag Easily integrated into any existing pedalboard Works with 4 x AA batteries, alkaline batteries for 18 hours battery life USB port for internal firmware updates, power and connection to ZOOM Guitar Lab Maximum number of simultaneous effects: 5 Personal Sounds: 50 Sampling frequency: 44.1 kHz A / D conversion: 24 bits, 128 times oversampling N / A conversion: 24 bits, 128 times oversampling Signal processing: 32 bits Screen: Dot matrix LCD 128x32 ENTRANCE INPUT: Standard mono 6.35 mm jack Nominal input level: -20 dBu Input Impedance (line): 470 k IN THE : 3.5mm stereo mini plug Nominal input level: -10 dBu Input Impedance (line): 1 k EXIT OUTPUT: Standard 6.35mm stereo jack (combining line / headphone outputs) Maximum output level: Line 2 dBu (10 k or more output impedance) Headset 17 mW 17 mW (32 load) Input S / B ratio: 120 dB Background noise (residual noise): -97 dBu Food: AC adapter: DC 9 V, 500 mA, with negative pole in the center (Zoom AD-16) 4 AA batteries (approximately 18 hours of continuous operation with alkaline batteries, without LCD backlight) USB: USB MIDI, USB micro-B Power can also be provided through the USB port. If you use a cable designed for power only, other USB functions can not be used External dimensions: G1 OVEN Size: 156 mm (D) × 130 mm (L) × 42 mm (H) Weight: 340 g (without batteries) Note: 0 dBu = 0.775 V