*The Silicon Labs SI4734 DSP solution based design, DSP processing the analog and digital signal, software demodulation, greatly improve the signal reception sensitivity, signal selectivity, SNR and anti interference capability. *Built-in two speakers, support stereo program listening via the speaker. *World band broadcasting signal reception *Built-in the digital MP3 player *Support the standard SD memory card application. Support the keypad lock / unlock function. *Multifunction jog dial encoder switch to easy setup the digital clock, frequency tuning and favorite station preset memory address. *LCD display the frequency, signal strength, temperature (C/F), and battery level. *Built-in the standard 3.5mm stereo socket for line-in function to support the external stereo audio signal input. *Built-in the standard 3.5mm stereo socket for output to support the earphone application. *Built-in the standard 3.5mm stereo socket for external antenna signal input. *Built-in the alarm timer support the auto-power-on function. *Built-in the sleep timer support the auto-power-off function. *Built-in the smart charge circuit to charge the Ni-MH rechargeable battery. *Built-in the standard mini-USB port to get the power supply from the computer or external wall AC power adapter for smart charge function. *550 favorite stations preset in the memory: 100s for FM band, 100s for MW band, 100s for LW band, and 250s for SW band. *30 level digital volume control by the dedicated knob. *Built-in the standard SD card socket support the SD memory card application (Max up to 8GB size). *Output power: speaker > 180mW x 2, earphone > 10mW x 2 (32 Ohm). Specification FM frequency: 64 - 108 MHz LW: 153 - 513 kHz MW: 522 - 1620 kHz 520 - 1710 kHz SW: 2300 - 21950 kHz Power Sources: 3 x UM3 (AA Size) Batteries (excluded) or DC 5V adaptor (excluded). *Unit size: 187(W) x 90(h) x 30(d) mm *Accessories: stereo earphones, User manual ,line in cable & pouch.