Short Description: Model: K03 Input voltage: DC 5V Output power: 3W Frequency range: 100Hz-10KHz Battery capacity: 1800mAh Size: 64*64*235mm Reverb mode: echo sound reverb   Product Description: Dual magnetic speaker, noise-reduce technology The surface was made of radium and electroplating Built-in Bluetooth code, wireless & wired both can connect. Wireless singing: switch on, Bluetooth connection, music play, vocal volume, start karaoke. Song recording on cell for phone/PC/: audio cable connection, cell phone connection, open App, debugging and saving the song. USB cable to charge, 4 hours to fully charged, it can be used continuously on the microphone. Answer a call: it can be after the microphone is connected to the cell phone.   What’s in the box: 1x Microphone Bluetooth speaker 1x USB charging cable 1x Audio cable 1x Instructions Weight: 0.4   SKU: 2251832677050175