Nux Optima Air NAI 5, Effects Pedal for Electric & Acoustic Guitar, Dual-switch acoustic guitar simulator with a preamplifier for acoustic and electric guitars, 15 Built-in acoustic guitar profiles with IR level control, 9 Preset slots, Controls: Reverb, IR Level, Select, Gain, Bass, Middle, Treble, Push buttons: Select, LED: Effect on, Footswitch: IR / Amp, Input: 6.3 mm jack, Output: 6.3 mm jack, Send & Return: 2x 6.3 mm jack, Micro USB (Type B), DI output: XLR, Aux input: 3.5 mm stereo mini jack, Headphone connection: 3.5 mm stereo mini jack, Power supply connection: barrel connector 5.5 x 2.1 mm, negative polarity inside, Current consumption: 200 mA, Power supply via 9 V DC power supply (not included, suitable power supply: Art.#409939#), Dimensions (W x D x H): 115 x 105 x 58 mm, Weight: 420 g@+*Note:* Battery operation is not supported