Leak Gives You the Most Vibrant Color Experience! Advantages for this compatible item: ? Printing performance is almost the same as genuine OEM toner cartridge at 1/4 of the price. ?Convenient and cost-effective for daily use such as school, work, and home printing. ?Each toner cartridge was methodically tested to ensure full working condition and a superior print quality. ?Professional color box packing and multilayer shockproof packing can avoid product damage during transportation and distribution. ?Can be recognized by your printers and installed easily. Compatible with the following printers: Dell Wireless Workgroup Monochrome E310dw, E514dw, E515dw, E515dn Series Laser Printer Package Included: 2 Pack Leak compatible Dell e310dw P7RMX toner cartridge (2 Black) Cartridge Life: If you print about 50 pages of regular printing documents per week, cartridges will be run out in around 13 months. Warm Tips: ?Please confirm your printer model before placing order. ?The computer would appear Non-Genuine, please click "OK" continuously, then the printer can go on to print. ?If you receive the toner cannot recognize your printer please turn off 30 second then turn on and install again , also you can try take the toner out and use tissue with rubbing alcohol clean the chips softly. Customer Service