XW01K is an SOP-8 Touch Sensor ROHS manufactured by Sam&wing. It is a low power, digital active buzzer with an operation voltage of 3.3V and a frequency range between 1.2kHz and 5kHz. It has a built-in PWM signal generator with multiple output frequency option, built-in auto-power-down function, and is RoHS compliant. It also features a high-sensitivity adjustable touch sensitivity setting, a tight tolerance of sensitivity and threshold setting,and a sensitive response time, which has an adjustable response delay. It is designed to be used in various kinds of industrial control, smart home appliances, and other fields.