Loud Enough Professional 3.5-inch built-in magnetic speakers deliver up to 10 W output power to cover an area of 1,000 square meters, or a space that can accommodate 25-100 people. Extra Long Working Time Build in high quality lithium battery with sufficient capacity of 4000mAh. 6 hours fully charge provide 36 hours continuous working. Low battery alert is available. Previous page Amplifier for Teacher Can effectively protect the teacher's voice and make every lesson an enjoyable experience. Amplifier for Yoga Keeping the microphone within 0.5-1 cm of your mouth provides better amplified sound quality. Amplifier for Meeting Helping you to have a powerful voice so that your opinion reaches every corner of the venue. Amplifier For Promotion Norwii Voice Amplifier in noisy outlets to enhance promotional effectiveness. Next page 1 Teacher 2 Yoga 3 Meeting 4 Promotion NORWII Voice Amplifier S358 Add to Cart S328 Add to Cart S358 Pro Wireless Add to Cart S328 Add to Cart S358 Add to Cart S368 Add to Cart Customer Reviews 4.2 out of 5 stars 25 4.3 out of 5 stars 95 4.5 out of 5 stars 110 4.3 out of 5 stars 95 4.2 out of 5 stars 25 4.2 out of 5 stars 228 Price $23.99$23.99 $25.99$25.99 $37.99$37.99 $25.99$25.99 $23.99$23.99 $19.99$19.99 Charge Time — 4-6 Hours 4-6 Hours 4-6 Hours 4-6 Hours 2-3 Hours Use Time — 38 Hours 38 Hours 38 Hours 38 Hours 30 Hours Microphone Style — Wired Microphone Wired + Wireless Microphone Wired Microphone Wired Microphone Wired Microphone Bluetooth ✔ ✔ ✔ ✔ ✘ ✘ TF Card Port ✔ ✔ ✔ ✔ ✘ ✘ Recording function ✔ ✔ ✔ ✔ ✘ ✘