... 2.Built in Lithium battery 3.ABS material 4.Digital ,amplifier 5.low price and good look .· mini speaker ,panda speakder ... lovely panda shape ·Built-in lithium battery, built-in digital amplifier Supports: Ipod, MP3/MP4,computer,music Mobile, PSP game player ... quality stereo sound Built-in lithium battery, built-in digital amplifier Case material: Pure ABS Rate power: 1W Frequency range: 120HZ ...