Kaisi K-S21 Rosin pen

The Kaisi K-S21 Rosin Pen rosin atomizer is a portable, battery-powered tool for detecting short circuits on printed circuit boards that atomizes rosin without the need for a soldering iron. 
Features and functions:

 Short circuit detection: The main application is the quick and accurate detection of short circuits on the PCBs of mobile phones, computers, and other electronic devices.
 Ease of use: The tool has a pen-like design and is easy to hold and operate. Simply place a small piece of rosin (not included) in the device, press the button 5 times to turn it on, and then hold the button to start atomization.
 Built-in battery: It has a built-in 450mA lithium battery that can be charged via a micro-USB port.
 Auto shut-off: The updated version has an internal safety feature that automatically stops heating after 10 seconds of continuous operation, which increases safety.
 Portability: Its small size and lightweight design make it easy to carry and store in a toolbox.
 Board safety: The atomization process is gentle and does not damage printed circuit boards or their components.