Features: 1.PLL digital tuning for FM radio function: Frequency range 87.5-108MHz, 30 stations preset memory function. 2.Docking station function: Be able to connect to IOS series devices and play back the music. Support synchronizing with IOS devices next song/previous song, pause/play and menu control function mode etc. IOS device plug in speaker system docking and under play mode, system will recharge IOS devices battery automatically. For Android system mobile phones, need Android 4.2 version above phones, can charge and play music by plug into micro USB port. 3.Bluetooth NFC function: Built-in NFC near field communication, allow bluetooth for quick pairing between your NFC smartphone and the speaker docking. 4.LCD clock display function: 12H/24H mode setting. 5.Alarm function: Dual alarm mode setting up function. Alarm music can be selective sourcing from mobile phone ring tone, or FM radio, mobile phone music play. 6.USB function: Dual USB output (1 A and 2.1 A), charging for any mobile phone, tablet pc. 7.AUX function: Line in audio input, you can connect with MP3/MP4, PC device or PDA etc. 8.Sleeping mode function: Multiple segment sleeping mode set up ,minimum from 10min,15,30,45, maximum up to 60 min can be chosen. 9.Snooze mode function: Every 9 minutes alarm once, total 3 times. 10. Full remote control function. Specification: Input: AC 100-240/50-60HZ Output: DC 5V/3A Backup batteries: 2*1.5V (AAA Battery) Impedance: 4Ohms * 4PCS Output power (RMS): 3W*4 Frequency response: 100Hz-20 KHz SNR > 80dB Product size: (L) 150mm*(W) 110mm*(H) 50mm Weight: 800g Docking interface: 30pin / 8pin for IOS system, and micro USB port for Android system