A compact, portable ultrasonic cleaning device with a built-in aluminum digital pressure gauge for the care of your turntable stylus. With a carefully selected 110kHz ultrasonic cleaning frequency, it only takes 20 seconds to achieve safe and effective cleaning results without abrasion to the delicate stylus tip. It is highly compatible with different types of cartridges with the stylus rubber support provided. Its convenient use makes the cleaning experience effortless when you can just flip the device around to measure the downforce right after the ultrasonic bath. HumminGuru S-DUO Stylus Cleaner uses 110kHz ultrasonic cleaning frequency that creates much smaller cavitation bubbles to thoroughly remove dust, dirt and hardened dirt from the tip of the stylus pen. It is the first and only stylus cleaner with ultrasonic technology on the existing market. (If the frequency is lower than 20 kHz, it is only considered a vibration, but not ultrasonic technology) Cleaning the stylus in an ultrasonic bath with water requires no physical contact and is therefore risk-free on the surface of the stylus. Unlike these stylus cleaners that use motor vibrations to clean the pen with physical direct contact. The digital turntable cartridge pressure gauge is cleverly integrated into the HumminGuru S-DUO device, which makes setup more convenient, faster and easier for the user. With the function of a bi-directional LCD display, the user can easily flip the device and measure the output directly after ultrasonic stylus cleaning. The stylus cleaner and power scale indicator (2 in 1) is compatible with various types of cartridges such as Audio-Technica VM520EB, Denon DL-103, Denon DL-102, Ortofon 2M Red etc. The product size is 12.5 x 7.1 x 3.8 cm. Installed with four AAA batteries, the weight of the device is only 176g. It is compact, lightweight and portable, so users can easily transport and takes up little space for storage.