Expand hearing range of your signal with POWVINE. Compact but powerful device creates sound up to 130 dB. Designed for long operation: up to 200 days or about 5000 signals without recharging. Durable body of ABS is resistant to high temperatures, impacts and moisture preserving reliability in any conditions. Control is performed by one press helping avoid danger in unexpected situations. Convenient accessories and two elastic straps offer easy installation on handlebars of different diameters