Connection: Wired bluetooth standard: Bluetooth v5.1 channels: 3 (2.1) output power: 10-30W cabinet material: Wood, Plastic frequency range: 60Hz-23KHz Use: Mobile Phone, Karaoke Player, COMPUTER battery: NO Waterproof Standard: IPX 4 woofer size/full-range size: 4.5" tweeter size: 2.5" Impedance: 4Ω Audio Crossover: TWO-WAY pmpo: 10-30W support app: NO remote control: NO display screen: NO voice control: NO built-in microphone: Yes support microphone: No with handheld microphone: No led lighting: Rainbow Light feature: colorful LED light private mold: Yes support memory card: Yes number of loudspeaker enclosure: 3 Product name: JERTECH SBK-8070 Power 15W Backlight Speaker Set Support: FM/USB/SD Iput/USB/SD/MMC/DVD/PC/M