This listing is for the VELP ZX4 Mixer Vortexer. The unit is in full working condition and is ready for immediate use. The VELP ZX4 is a robust, high-performance vortex mixer designed for everyday lab mixing needs. With variable speed control, a patented infrared (IR) sensor mode, and a wide accessory range, it's ideal for labs that require ergonomic and flexible operation. Features include electronically controlled vortexing with speeds from 0 to 3,000 rpm, dual operating modes (IR Sensor Mode and Continuous Mode), universal power compatibility (100–240 V, 50/60 Hz), high chemical resistance with durable technopolymer casing, exceptional stability with zinc alloy base and anti-slip rubber feet, and IP42 protection. Compatible with various attachments for tubes, microplates, and small flasks. Ideal for mixing microcentrifuge tubes, PCR tubes, vials, and microplates in biology, chemistry, and biochemistry labs.