Specifications: Color: Black/ Red/ Blue(optional) Material: Aluminum Alloy Screen Size: 2.4in Screen Type: LCD Screen Waterproof Rating: IPX6 Endurance: 28 hours Charging Time: 2 hours Wireless Protocol: BT4.0 and ANT Size: 86.5 *51.6 *21.6mm / 3.4 *2 * 0.85 in Weight: 80g / 2.8 oz Package Size: 17 * 8 * 5 cm / 6.7 * 3.1 * 2 in Package Weight: 174 g / 6.1 oz Package List: 1 * Bicycle Computer 1 * USB Cable 1 * Manual 1 * Safety Lanyard