ION Audio Block Rocker (iPA56D) | Portable Bluetooth Speaker with USB Charger and Wheels & Handle for Transport [2014 Model] Ion Audio iPA56D Block Rocker Portable Bluetooth Speaker System with USB Charger and Wheels and Handle for Transport - (Discontinued by Manufacturer). Powerful 50-Watt speaker system with high-quality woofer and tweeter speakers for enhanced dynamic range and sound clarity|Streams music wirelessly from any Bluetooth device up to 100 feet away|Easy Pair links your NFC-enabled smartphone with a simple tap*|USB power bank for charging|Built-in rechargeable battery lasts up to 50 hours