SONOFF SNZB-01P is a small Zigbee wireless smart switch that can even fit in your pocket, with preset actions for single press, double press, and long press to control multiple devices. It supports Zigbee hubs using the Zigbee 3.0 protocol and can be used with various smart home systems. The switch has a larger button area, 5 years battery life, and an external pairing button, making it easy to install and replace the battery. It can be used as a doorbell, emergency button, or to trigger Alexa routines. The switch also supports two-way control when connected with SONOFF smart wall switches.