With specially engineered effects, a built-in looper and a drum machine, the A1X FOUR is the first Multi-Effects Processor designed for a variety of acoustic string and wind instruments. Features: A1 FOUR offers over 80 built-in effects / A1X FOUR offers over 90 built-in effects Dedicated effects for acoustic guitar, saxophone, trumpet, violin, and harmonica Up to 5 effects can be used simultaneously, chained together in any order 50 memory locations for storing user-created patches Looper for recording up to 30 seconds / 64 beats of CD-quality audio with seamless start and end times ZOOM Guitar Lab software for creating, editing and managing effects and patches 68 built-in rhythm patterns tailored for unplugged styles of music can be used in combination with the Looper Onboard chromatic tuner supports all standard guitar tunings, including open and drop tunings Output jack for connection to amp or headphones A1 FOUR and A1X FOUR run on 4 AA batteries, with alkaline battery life of 18 hours; MAA-1 Requires 2 AA batteries USB port for firmware updates, power and connection to ZOOM Guitar Lab Specifications: Max. Number of Simultaneous Effects: 5 User Patch: 50 AD/DA Conversion: 44.1 kHz, 24-bit 128× oversampling Signal Processing: 32-bit Display: 128x32 dot matrix LCD Connections: Standard mono phone jack, Aux In Stereo mini jack Rated, Standard stereo phone jack (combined line/headphone), Power: AC Adapter 9V DC 500mA centre negative (ZOOM AD-16) 4 AA batteries (about 18 hours continuous operation time when using alkaline batteries with the LCD backlight off) USB: USB MIDI, USB Micro-B Power can also be supplied through the USB port. Includes: G2 Four or G2X Four Effects & Amp Emulator, AD-16 AC Adapter, Quick Tour Includes: A1 FOUR or A1X FOUR Multi-Effects Processor, MAA-1 Mic Amp, Quick Guide, Patch List Dimensions: 156 mm (D) × 216 mm (W) × 52 mm (H) Weight: 610 g (excluding batteries)