Maxell Universal Tablet Sound System (191284) Bold sound, lightweight and portable Ability to change from portrait to landscape Extra USB port for charging Works with most tablets Power Source: DC 5V 2A power adapter The charger comparability is included but not limited to Apple iPod, iPhone, Samsung Galaxy series (phone), Amazon Kindle First and HTC(all mobile phone products). Audio Input: 3.5mm Driver Size: 2 x 1.5-inches