Purchase links
Sequremall - https://sequremall.com/products/sequre-si012-oled-soldering-iron Aliexpress - https://www.aliexpress.com/item/1005003792787853.html SI012 Features 1. Multi mode power supply: dc12-25v, 3s-6s, pd3.0 2. Compatible with Sequre 001 and Hakko T12 soldering iron heads 3. Buzzer function reminder. 4. Programmable firmware upgrade. 5. Intelligent temperature control algorithm, one key temperature rise, accurate temperature calibration and efficient compensation.