Used for motherboard maintenance and inspection. Compact size, easy to operate. No soldering iron required. Built-in rechargeable battery. Instructions for use: 1. Break the rosin block into small pieces. 2. Use the included rosin spoon to place a small piece of rosin into the rosin atomizing pen. 3. Press the button five times quickly to activate the device. 4. Press and hold the button to preheat for two seconds. 5. The device is ready for use once smoke is produced. Size: 10 x 5 x 3cm Material: Plastic Color: As shown in picture Package Contents: 1 x bulb nebulizer, 1 x data cable, 1 x rosin spoon, 1 x battery pole. Other products not included. Note: Due to light reflection and differences in display screens, the color of the item may vary slightly from the image. Measurement error allowance: +/- 1-3cm.