Here is what Vox say...
'The VX II from VOX takes modeling amps to the next level. The all-new VET (Virtual Element Technology) modeling circuits at work in the VX I and VX II offer guitarists the best of both digital and analog amplifier design, as it accurately revives a myriad of classic amplifiers. In order to obtain a more authentic sound and produce sound more efficiently, VX amps employ a uniquely designed-bass reflex structure combined with a sealed, one-piece speaker enclosure. The cabinet's shape, curvature of the front and back surfaces, and the internal reinforcement ribs have all been carefully designed to optimize the resonance. A conventional wooden baffle was chosen to retain the projection and tone of a classic guitar amp, while the cabinet is constructed from a lightweight and durable ABS material that produces superior acoustical properties with quality sound and easy portability.
The VX II features 11 classic amp models and eight distinct effects, and it allows for 22 unique user presets. The amp models cover a lot of ground, ranging from classic American and British amplifiers of the 1950s and 1960s, to the coveted sounds of the classic VOX AC30, to some modern, high-gain tone monsters. Complementing these great amp sounds are eight classic effects which include chorus, flanger, phaser, tremolo, tape-style delay, analog-style delay and two types of reverb: spring and hall.
The VX II is equipped with a USB port for simple integration with a PC, Mac, or even iOS & Android platforms and also comes bundled with VOX’s JamVOX III and the new VOX Tone Room software for deep editing of your favorite amp models and effects! Tone Room is available to download on your PC, Mac via the Support tab of this page and is also available for your iOS and Android devices via the App Store or Google Play!'