Wireless tie-clip amplifier: small and light, loud volume, anti-howling, suitable for tour guides, training, lectures and multiple scenarios. Clip-clip wearing: free your hands and refuse to be bound. The newly upgraded tie-clip microphone gets rid of the traditional head-mounted headset and wired wear, making it more beautiful and more comfortable to use; small and portable, freeing your hands. High performance: 76mm large speaker with internal magnetism, highly restored human voice, 5W true power, loudness coverage of more than 100 people, smart chip, smart noise reduction. Magnetic hidden integrated design: The microphone end of the speaker is magnetically hidden on the back of to maintain integrity. It is done in one go! Use, storage, charging, and carrying are all hassle-free! Microphone type: tie-clip microphone Built-in battery capacity: 50mAh-100mAh (inclusive) Rated power: 5W Signal-to-noise ratio: equal 60dB Radio head: capacitor Battery: built-in battery Charging voltage: 5V=1A Battery capacity: 2000mAh Frequency response range: 20Hz-20kHz Color:Black Material:plastic Package Contents: 1 * Lavalier Microphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.