UHF Wireless Technology: Enjoy the freedom to move and sing without the hassle of tangled wires, thanks to the UHF wireless connectivity of the C20 Plus speaker system TF Card Play: Enjoy music playback directly from a TF card, giving you the flexibility to listen to your favorite tracks even without a Bluetooth-enabled device Versatile Reverb Modes: Explore various reverb modes to enhance your singing experience, from echo to concert hall effects, offering a customizable sound for every performance Strong Compatibility: With its wide compatibility, the C20 Plus speaker system works seamlessly with smartphones, tablets, laptops, and other Bluetooth-enabled devices, providing endless entertainment options Dual Microphone Input: Host duets or group performances with ease using the dual microphone inputs, perfect for family gatherings, parties, or karaoke nights with friends Specifications: Model: C20 Plus Wireless Module: 5.0 Frequency Response: 60Hz-20KHz Transmission Distance: ≥10 meters Speaker: 52mm 4Ω 5W Charging Voltage: DC 5V-1A Speaker Battery: 3.7V 1000mAh Microphone Battery: 3.7V 500mAh Speaker Charging Time: 2-3 hours Speaker Usage Time: 2-4 hours Microphone Charging Time: 2-3 hours Microphone Usage Time: 2-4 hours