"The most advanced cordless fillet knife ever, the powerful Rapala Lithium Ion Cordless Fillet Knife provides a full 80 minutes of continuous run time with no loss of power until it finally shuts off. Low memory effect increases the number of possible charge/discharge cycles. 7-1/2"" reciprocating blade is included; comfortable grip for fatigue-free work; air flow body design keeps the engine running cool and smoothly. A full 80 minutes of continuous run time with no loss of power Low memory effect 7-1/2"" reciprocating blade included Comfortable grip for fatigue-free work Air flow body design keeps engine running cool"