The ihunt by ruger bluetooth speaker is the only speaker optimized to work with the ihunt by ruger app.The speaker works out 50 yards and is loud enough for any conditions with up to 115 db of sound.It operates on 4 c-cell batteries.When paired together, your phone controls the app and allows you to create an infinite number of playlists, no computer required.With the ihunt by ruger bluetooth speaker, the app is free to download (apple and android versions) with limited use of the call library and the option to unlock.Calls: 600 Calls, 47 SpeciesType: BluetoothSpecies: MultipleMaterial: PlasticSound Species: MultipleElectronic: YesBattery: CColor: OD GreenStyle: BluetoothProofs: Water ResistantDifficulty Level: EasyPreset Features: YesHands Free: YesCompatible With: iPhone/AndroidSounds: 750 Preloaded