Upgrade your ride with the Ultimate Bicycle Speaker Mount and Headlight. This space-saving device is a Bluetooth speaker, phone mount, phone charger and dual LED headlight, all in one. Adjustable bracket fits most phones up to 3.5” wide, with a built-in microphone for hands-free calling. Shockproof, dustproof, water-resistant body (IP 54 rated). Speaker operates about 30 hours on a full charge.