CP0281R Features Designed in the shape of an apple Supports TF/ Micro SD card， USB flash drive and FM radio Features a USB port， DC power port， 3.5 mm audio port， TF card slot Compact size and lightweight General Specs Material Aluminum alloy Speaker Size 1.77" (45 mm) Speaker Power RMS 3W THD=10% S/N Ratio ≥80dB Frequency Range 150-18000Hz Output Jack 3.5 mm audio jack Other Output USB 2.0 Card Reader Supports TF/ Micro SD card U-disk Supported Yes Battery Built-in 550mAh lithium battery Input 5V 500mA Additional Function Built-in FM radio - frequency: 87-108MHz Compatibility Cell phones， MP3/ MP4 players， PCs etc. Dimensions 50 x 50 x 50 mm