Please be noted this listing includes 3 models for order option: 1. T-002 (4 tones, volume not adjustable, multi casing colors for order option) 2. T-002P (1 tone, volume adjustable, only black casing) 3. T-002S (4 tones, volume adjustable, only black casing) 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-ward, 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; - Sound mode: 4 tones (T-002, T-002P); 1 tone (T-002S) - Volume adjust: Not adjustable (T-002); 3 Adjustable (T-002P, T-002S) - Noise: 100db; - Control: wired switch; - Switch wire: spiral shaped, range: 15-30CM; - Battery: Li-polymer 280mAH; - Charging: 5V, mini USB port, about 1.5 hours to full charge; - 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).