Our insistence: 1. Equipped with the latest IC chip, it supports the remaining power display function. 2. SIMPLEWORK has undergone comprehensive multiple printing quality tests, and the toner cartridge prints smoothly without clogging. 3. Our products are protected by four layers of packaging to avoid ink leakage and damage caused by squeezing and falling, and improve the shopping experience. Toner cartridge installation guide: Step 1: Shake gently for 5 seconds to evenly distribute the toner. Step 2: Remove the orange rings from both sides of the toner cartridge. Step 3: Insert the toner cartridge into the drum assembly. Step 4: Insert the drum assembly (with toner installed) into your printer. Warm Tips: Please be sure to confirm your printer model before placing an order.