SHIDU S28 25W Portable Wireless Voice Amplifier for Teacher Bluetooth Speaker with Microphone Echo A

SHIDU S28 25W Portable Wireless Voice Amplifier for Teacher Bluetooth Speaker with Microphone Echo AUX TF USB Flash Recording - Blue Stylish, ergonomic, and comfortable design High power double magnetic trumpet, more clear and penetrating Bluetooth 4.2 chip, signal transmission more fast and stable UHF wireless MIC with built-in high-quality lithium battery Adopt 3.5 Inch HiFi double magnetic big-size trumpet, maximum peak up to 25w Adopt SHIDU acoustic amplification electroacoustic system Equipped with SHIDU special acoustic microphone. HiFi original sound amplification Super MP3 audio encoding technology. Support TF Card & U Flash Disk One-Touch HiFi Recording Support AUX: Can connect with PC and work as a speaker Specifications: Output power: 25W Charging voltage: DC 5V 1A Lithium battery: 7.4V, 2000mAh Working time (50% volume): 8~10 hours (music mode); 10~12 hours (wired microphone) Charging time: 3~5 hours Product size: 123 x 99 x 48mm Unit weight: 298g Working temperature: -10?~45? Frequency response: 90Hz~18KHz Sound coverage: 2500? Wireless distance: 30-35m