Great for sports officials, coaches and referees while meeting the needs of the avid sports fan. Can be heard up to one mile away. Recommended for boats up to 64". Easy to operate push button horn. Meets USCG requirements for marine use. Size: Mini Weight: 1.4 Oz Assembly required: no Ozone safe for a cleaner environment Push button horn Made of high impact plastic Small & compact Recommended for boats up to 64" Ideal for all sporting events.