MediaBug Summit Rugged Water-Resistant/Waterproof Portable 10W Wireless Outdoor Bluetooth Speaker with Power Bank for Smartphone Charging for iPhone, Android, Windows, and More (Black) Advanced Bluetooth 4.0 Technology - Ultra-optimized version of Bluetooth that consumes less energy and delivers crystal clear sound with industry-leading aptX technology Jaw-dropping Sound Quality and Volume - Equipped with a passive subwoofer and two 40 mm drivers, the Summit speaker sports 10 Watts of total output power and delivers the rich bass and the incredible sound quality that you crave. High Capacity 4000mAh Lithium-ion Rechargeable Battery - Enjoy up to 14 hours of uninterrupted playtime with a single charge. Water-Resistant & Rugged - Rated IP65 for protection against water and dust. The rugged silicone exterior provides extreme resilience to drops. Built-in USB Device Charging - Charge any USB-powered device on the go with Summit's built-in USB power bank. Summit can keep your device juiced up with up to 2 full charges for the iPhone 6