Features:Two tuning modes (Chromatic， Guitar)， flat tuning function.Built-in metronome with selectable rhythm patterns.AUX-IN for connecting with external music player like mp3 and CD player.TS/AC brings out the realistic guitar tone.Three types of amp sound: Clean; Blues; RockThree types of speed modulation effects: Chorus; Flanger; TremoloThree types of ambience effects: Room; Spring reverb; Delay (delay time lasting for about 800ms)Passive 3 band EQ for nature tone.18 types of preset: P1-P9 preset by manufacturer; U1-U9 for you to set according to your need.Built-in noise reduction switch.35mm * 20mm clear LCD display for tuner and metronome.Specification:Color: RedHousing material: PlasticSampling frequency: 44.1 kHzAD/DA conversion: 24bitSignal processing: 24bitNominal input impedance: 1M?AUX IN input: -10dBu/22k?Headphones output: 125mW+125mW(into 32? load) (not included)Display: Backlit LCDTuning range: A0 (27.50Hz)-C8(4186.01Hz)Reference pitch: A4 (435-445Hz)Power adapter: 9V DC ?Y200 mA (not included)Power: 2 * AA alkaline batteries (not included)Working with batteries: Lasting for about 8 hoursProduct size: Approx.8.2 * 11 * 2.3cm / 3.2 * 4.3 * 0.9inProduct weight: 142g / 5ozPackage size: 13.5 * 8.9 * 4.5cm / 5.3 * 3.5 * 1.8inPackage weight: 177g / 6.3ozPackage List: 1 * Guitar Effect 1 * User Manual (English)