Premier Elite Odyssey 1 wireless External SounderModel: GBP-0001Ricochet Mesh Technology 868Mhz105dB(A)Piezo SounderHigh Brightness LED StrobeSelectable comfort LED'sIP65 sealed electronics2 to 5 Year Battery Life2 Year WarrantyWall and Lid TamperPowered by 8 x AA Lithium Batteries (included)PD6662: 2010, EN50131-4, EN50131-5-3 Grade 2, Class IV