Total Output Power: 18W Pure Output Power (RMS): 9W Speaker Unit: 2.75" Frequency Response: FM 87.5-108MHZ Power Supply: AC100-240V Bluetooth: Yes BT Working Distance: Up to 10M USB Drive: Yes Micro SD Card Slot: No FM Radio: Yes AUX Line-In: Yes Optical Cable Input: No 7 Colors Pulsating LED: No Remote Control: No Alarm: Dual Alarm Wireless Charger: Yes Battery Backup: 2 x AAA Dimension: L115 x W115 x H110 (mm) Weight: 0.75kg