The at lp120usb has three speeds 334578 rpm meaning you can play all types of records as well as a reverse function allowing to play backwards and a selectable high accuracy quartz controlled pitch lock and pitch slider with 10 or 20 ranges the at lp120usb hcat lp120usb hcbk is compatible with the at mono3sp cartridge allowing playback of 78 rpm mono records the at mono3sp is available to purchase separately and is not included with this turntable you can connect directly