Yamaha YDS-120 Digital Saxophone Features: 15-step volume adjustment Headphone terminal, Aux in jack 73 voices, including 56 for saxophone Same key layout as an acoustic saxophone Specially designed mouthpiece Breath sensor that detects your breath pressure Analog Controller for added expression Compatible with Yamaha’s dedicated YDS Controller app Power source: USB (micro USB type-B) or batteries (4 × AAA batteries) Tech Specs Type:Digital Saxophone Number of Keys:23 Type of Keys:Saxophone Fingering with HIgh-F#, Front-F, Low A Presets:73 Voices (including 56 sax voices) Effects Types:5 Inputs:1 x 1/8″ TRS (AUX) Outputs:1 x 1/8″ TRS (headphones) USB:Micro-B Software:YDS Controller App Power Supply:USB Bus Power, 4 x AAA Batteries Height:32″ Width:33″ Depth:7″ Weight:78 lbs Manufacturer Part Number:YDS-120 Categories: Alto Saxophone, Saxophones