EF0034B Features Apply to any 3.5 mm interface audio play device， such as CD， MD， MP3， MP4， PDA， Tablet PC， notebooks Used to play music and receive radio With speakerphone function High-fidelity， high-resolution stereo effect Blue backlit LCD display  General Specs Model LH-200 FM Full-range 87.5 - 108.0 MHZ Separation    60 DB Battery Built-in 4.2V 130 MA lithium battery Working Hour More than 4 hours Package Details Weight: 74.90 g Size: 16*9.5*2.7 cm Package Includes * FM Transmitter