Characteristics and Interoperability RGB Multifunction LED Bluetooth Speaker Home Smart Lamps with 15W Wireless Charger Alarm Clock Speaker Halloween Presents Technical feature Power output for wireless charging: 15W Version of Bluetooth: 5.3 Name on Bluetooth: BT3401 Power output: 5W Bluetooth frequency range: 2.48 GHz to 2.4 GHz Ten meters is the transmission distance. Sound frequency range: 50 Hz–20 kHz The machine's overall sigto noise ratio is higher than 75 db. Voltage of the integrated lithium battery: 3.7V input for charging: DC5V / 500MA Size of product: 235*80*238 mm Weight of the product: 770g