High quality : Made of durable materials, reliable charging base. Excellent performance: Output short circuit protection,overpressure and overload filter protection. Stable current transmission of charging. Easy to use: Charging stand makes it easier to charge the speakers. Simply place the speaker on the dock . Convenient and fast: Small DC ripple, high working efficiency and fast charging speed. Good anti-interference performance Safe and reliable : Low working temperature and long service life. Specification: Applicable to models: for Logitech ultimateears BOOM 3 for Logitech ultimateears MEGA BOOM 3 for Logitech ultimateears BLAST for Logitech ultimateears MEGA BLAST Size Chart: Material: plastic Base size: 89x16.7mm/3.50x0.66inch Cable length: 1m / 39.37inch Package Includes: 1 Set USB Charger Dock with Cable Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!