Naturally recorded digital output represents multiple bird calls, attracting eastern bluebirds, goldfinches, baltimore orioles, house wrens and other songbirds to your feeding station or nestbox. The magnet also mimics the dawnsong heard from every purple martin colony, inviting new arrivals to make their home in your purple martin house. Includes volume control and 50ft. AC cord. Designed in consultation with ornithologists and biologists for maximum realism Digital recording — more durable than tapes Each song is set to play at naturally occurring sound levels and intervals Choose between songbirds or purple martins Songbirds sing intermittently from dawn to dusk Purple martins chatter for two hours at dawn Override the photocell sensor with timer for either call series Weatherproof Includes volume control and 50ft. AC cord Model SBM