... amplifier ampilifer with external amplifie bird sound caller for hunting,hunting product,Hunting bird MP3,hunting device,hunting equipment1.Featurehunting equipmentwith Li-battery ... single-Loop playbackSupport 8 to 320 Kbps MP3 format file ,perfect voiceSupport maximum 1GByte SD ... first choice of hunting,Please do not hesitate to contact with me for manual ! mp3 hunting bird speaker with remote ...