Product details:

The professional-grade PAS-225SB power source with trimmer attachment provides an economical and versatile way to add to your yard tool arsenal. Compatible with up to 11 ECHO attachments. Tool-less coupler for easy switches between attachments. Use a 50:1 ratio of fuel to oil mix for 2-stroke cycle engines. Recommend using only fresh gas with a minimum octane rating of 89 or higher (mid-grade to premium) at all times A 50:1 Ratio = 1 US Gal. 89 Octane + 2.6 fl. oz.