SHIDU S278 15W Portable Voice Amplifier Wired Microphone FM Radio AUX Audio Recording Bluetooth Spea

SHIDU S278 15W Portable Voice Amplifier Wired Microphone FM Radio AUX Audio Recording Bluetooth Speaker for Teachers Instructor - Rose Gold High power double magnetic horns, more clear and penetrating Bluetooth 4.2 chip, signal transmission more fast and stable Wired mic with built-in high quality lithium battery OLED screen, adopt 3.5 inch HiFi double magnetic big-size horn, maximum peak up to 15W 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 disk One touch HiFi recording Support AUX, can connect with PC and work as speaker Support FM stereo radio Specifications: Output Power: 15W Charging Voltage: DC 5V, 0.5A Lithium Battery: 3.7V, 2500Mah Working Time: With 50% Volume: 8~10 Hours (Musical Mode); 10~12 Hours (Wired Mic Mode) Charging Time: 3~5 Hours Product Size: 115*86*35mm Unit Weight: 204g Working Temperature: -10?~45? Frequency Response: 200Hz~18Khz Sound Coverage: 800?