Drive coyotes crazy with this easy-to-use, highly effective whimper call! The Johnny Stewart Wildlife Calls™ Estrus Whimper Coyote Predator Call is used year round by coyotes, especially during the estrus cycle. To reproduce the sound using the Estrus Whimper call simply push the lever until it stops and blow air into the call as shown in the instructional DVD (included). Manufacturer model #: EWP-1. Drive coyotes crazy Easy-to-use, highly effective whimper call Simply push the lever until it stops and blow air into the call Instructional DVD included