The New Podospray Gold features modern design with soft touch buttons for all functions. LC display provides a constant read out of all the current settings. Easily programmed memory settings for spray and motor speed. 400ml capacity visible water tank easy to refill. S1 is the standard version with 40,000 rpm NSK motor and AHA clean head handpiece with automatic chuck which locks the bur in place when the motor starts. The S2 features a 40,000 rpm NSK motor and an autoclavable handpiece. This model has a manual chuck which twists to lock bur in place. The front section can be removed for cleaning and autoclaving.