USB mini speaker Tiny, portable. Applicable to iPods, MP3/MP4 player, PDA, Mobile phone, PSP, MD player, Walkman, etc ... Bui

USB Powered mini Speaker Features: Tiny, portable. Built-in lithium ion battery, changing via USB port. Dual 3.2cm speaker. Retractable resonator provide louder sound. Power volume control knob. Applicable to iPods, MP3/MP4 player, PDA, Mobile phone, PSP, MD player, Walkman, etc ... Specifications: Speaker out put: 2W x 1, 1W x 1 (3.2cm, 2.8cm) Sensitivity: 82 +/- 3dB Lithium ion battery input: 4.2V DC

Lithium ion battery output: 3.6V DC

mini speaker