I have the Echo... and love it...
If I were you... I'd do this for starters...but for coyotes only...forget the howls if your after other critters... and for bobcats... let distress run for at least a full 30 mins or more... mostly birds..
let the female coyote howl twice...then quiet 1 min... then once more... quiet 1 min... (full volumne)
after those 2 mins... run snowshoe or jackrabbit or ringneck pheasant in distress for 30 secs... at full vol... then wait for 1 min...
after those 3 1/2 mins... repeat distress sequence for 1 min...and wait for 30 secs this time... but with 2 notches of less volumne...
then run pup in distress for 15 secs...full vol... then quiet for 30 secs...
then distress again... same type or maybe something a tad softer like mouse or bird... for 2 mins at half vol... then quiet for 1 min...
then pup in distress again for 30 secs... then quiet for 1 min or more...
if nothing comes by then.... move and or forget my sequence stuff and get your money back...LOL...