The 28K hand-held (straight handle) transducer is a highly efficient ultrasonic device that can efficiently convert electrical energy into mechanical energy and generate powerful ultrasonic waves with a frequency of 28KHZ. It operates based on the piezoelectric effect and is mainly composed of piezoelectric ceramic oscillators, front and rear cover plates, electrodes, etc. This transducer has a unique frequency design. The longer sound wave wavelength can penetrate thicker liquid layers. During cleaning, it can reach micro-pores, crevices and complex surfaces, effectively breaking down stubborn dirt, grease and microorganisms. Moreover, it features excellent stability and environmental adaptability. Made from high-quality materials and with precise craftsmanship, it can operate stably under various temperature and humidity conditions. The design is compact, making it easy to install and maintain.