Self opening lid: Transparent blue lid allows for a clear view of samples in the rotor. Start and stop of centrifuge can either be controlled by on/off switch or by activating self-opening lid. By depressing lid button, lid automatically opens allowing full access to samples. Quick release rotors: Supplied with two rotors. An 8 place tube rotor accommodates 1.5/2ml tubes and a 4 place strip rotor accommodates 4 x 0.2mL tube strips or 32 individual PCR tubes. Rotors both have a unique quick release hub design. No tools are required to exchange the rotors, simply snap off and snap on to change between applications. Rapid braking: Brake system is controlled electronically. Once lid opens, it signals the brake to activate so that the rotor will come to a quick and soft stop without disrupting the samples.