Model Number: MV-10S. Key Specifications/Special Features: 10W effective distance: 600 yardsPower source: UM-2 x 6 piecesPower duration: approximately six hoursMicrophone: dynamic dimensions:Horn diameter: 200mmTotal length: 340mmWeight (without battery): 1.5kg Specifications: MP-5 MV-10S MV-16S MV-20S Effective distance 400yards 600yards 800yards 1,000 yards Power source SUN-3x8pieces UM-2 x 6pieces UM-2 x 8pieces UM-2 x 8pieces Power duration approximately six hours approximately six hours approximately six hours approximately six hours Microphone dynamic Mic dynamic Mic dynamic Mic dynamic Mic Horn diameter 195mm 200mm 230mm 230mm Total length 320mm 340mm 360mm 380mm Weight 1.0kg 1.5kg 1.6kg 1.65kg