Amplifies your voice and saves your throat when you have a difficult time speaking loudly enough. Delivering 15W output power for clear and soft sound to cover a wide area UHF wireless technology, automatical pairing after power on. It's more resistant to interference, longer transmission distance, and better listening experience Supporting FM radio function, one-key recording, USB flash drive playing and TF card playing (card not included) With a 3.5mm AUX audio jack, easy to use as a speaker Built-in a 1800mAh lithium battery, you can use it for up to 12 hours with a fully charged battery Very suitable for teachers, tour guides, promoters, fitness and yoga instructors, etc Package included: 1 x Wireless Voice Amplifier 1 x UHF Wireless Microphone 1 x Microphone Charging Cable 1 x Voice Amplifier Charging Cable 1 x AUX Cable 1 x Waist Strap 1 x English and Chinese User Manual 1 x Certification