The duration of continuous use mainly depends on the model of ultrasound you buy. For example, the larger single slot machine you buy has a fan inside its generator, and there is no problem with it after 5 hours of use (the ambient temperature should not be too high, otherwise it will affect heat dissipation). For example, if you buy a small ultrasonic cleaning machine, the inner slot is disposable stamping, and the generator is a circuit board placed at the bottom of the slot. The overall preparation is generally very small, and it is placed on a desktop or laboratory. Although there is also a fan at the bottom, the heat dissipation is not ideal. It is best not to use this equipment continuously for more than 2 hours, otherwise the equipment is easily damaged.