Features: · Compact size, light weight, big sound loudspeaker; · Li-polymer battery embedded, USB charge, long time standby; · With separate button for mode selection and switch, easy to operate; · Installed down forward, less occupation on handlebar; · Comes with different colors for option to match needs; · Quick mount and release, tools free. Specifications: · Item: Electronic Horn, TWOOC T-002; · Noise: 110-120db; · Sound mode: 3 modes (Whistle, Siren, Trumpet); · Control: Wired Switch, 2 buttons, 1 for mode choice, 1 for switch; · Switch wire: spiral shaped, range: 15-30CM; · Battery: Li-polymer 280mAH; · Charging: 5V 250mAH, about 1.5 hours to full charge, supports 2000 times horn ring; · Ingress protection: Water Splash Proof; Do not submerge in water; · Mount: by rubber strap, horn fits tube dia.22-31.8mm ; Switch fits tube dia: 18-24mm · Net Weight: Approx 40grams. Package Includes: 1 * Horn with wired switch; 1 * Rubber Strap; 1 * USB Cable; 1 * Users Manual (English/Chinese Language).