Compatibility This is a thirdparty charging dock compatible with Ultimate Ears Boom 3, Megaboom 3, Blast, Megablast wireless bluetooth speaker. ProtectionThe dock build-in smart chips protecting your UE Boom 3/Megaboom 3 from over-current, over-voltage or short-circuit during charging. Lightweight & CompactIt is very lightweight and compact easy to carry around in your pocket, bag, etc.. charge Boom 3/Megaboom 3 at home, in office, in car or on travel. Durable & Stablewith premium quality and work like the OEM charger. If you have lost or damaged your original charger cradle. It is a good choice to replace the lost or damaged charger. Package includes1 x charger for UE Boom 3/Megaboom 3/Blast/Megablast, 1 x Micro-USB cable.