Ecological the wf m5690dwf uses up to 80 percent less power than competitive mono lasers thanks in part to its no heat technology no ozone gas is emitted and an improved quiet print mode and no fan noise during or after printing make it ideal for the work environment low running costs the wf m5690dwfs high capacity ink cartridges of up to 10 000 pages allow you to print for longer and lower your running costs and there are fewer parts to replace than a laser save time this