Mini Digital Song Request Portable Recording Player

Product information:

Radio frequency: FM: 87 5-108MHz
Battery capacity: 500mAh (built-in polymer battery)
Playback duration: 2-6 hours (volume determines duration)
Charging time: 4-5 hours
Expansion type: USB/<micro SD>card
Product size: 100 * 61 * 25 4mm
Product model: L-328
Frequency range: 8-320KBPS
Signal to noise ratio; 87 dB
Speaker specification: 36mm 4ohms 3W
Power requirement: DC 5V
Input current: 500mA