Features and Specifications:4" High-Efficiency SpeakerBuilt-in Bluetooth(R) 5.0 Compatible Allows Your Speaker to Work with Bluetooth(R) Enabled DevicesTrue Wireless Stereo (TWS): Allows You to Connect 2 Speakers Via Bluetooth(R) with TWS Technology So they Can Play at the Same Time and You Can Double Your Audio OutputColorful LED Lights ShowMulti Connectivities: USB, Micro SD & AUX Inputs Allow You to Connect Your Non-Bluetooth(R)External Audio DevicesRechargeable Batteries (3.7V/1200Mah)FM Radio1 Mic InputDC In Power: 5V 1ASystem Type: 4" WoofersFrequency Response: 90Hz-20KHzS/N Ration: 60dBImpedance: 3 OhmRMS: 5W Lithium IonAccessories Included: ManualDimensions & Weight:Unit Dimensions (in): 6.38 x 4.57 x 7.8Unit Weight (lbs): 1.1Gift Box Dimensions (in): 6.38 x 4.57 x 7.8Gift Box Weight (lbs): 1.22UPC: 639131218048