Description: With USB and TF card interface, this amplifier can be directly inserted into the USB drive or TF card to play music, it supports a wide range of mainstream audio formats and can output high-definition sound quality. Using an intelligent noise reduction chip, this amplifier can filter environmental noise, and reduce the annoyance caused by noise, highly restoring the real human voice, and providing you with high-fidelity sound quality. It is constructed of ABS material. With a multi-functional design, this amplifier is remotely controlled and supports automatic recording, FM radio, and so on. The length of this amplifier is 10.5cm, the width is 9cm and the height is 3.3cm. Suitable for teaching, tour guide, promotion, training, reduce, singing machine, radio, listening to songs, storytelling, and so on, this amplifier has a wide range of applications. Item Name: Voice Amplifier Material: ABS Type: Wireless Applicable People: General Purpose Interface Type: USB Voltage: Dc 10V Connection: 3.5Mm Audio Jack Frequency Response Range: 20Hz-18000Hz Output Power: 60W Input Signal: Wired Microphone Input Impedance: 5Ω Signal-to-Noise Ratio: No Less Than 70db Sound Channel: 1 Operation Mode: Key Extended Storage: 32GB Number of Speakers: 1 Bluetooth-Protocol: 2.1 Effective Distance: 10 Meters Power Supply Mode: Built-in Battery Battery Capacity: 2200 mAh Playback Time: 8 Hours Charging Time: 3-4 Hours Use Occasions: Teaching, Tour Guide, Promotion, Training, Reduce, Singing Machine, Radio, Listening to Songs, Storytelling Features: LED Display, Long Battery Life, Remote Control Size Details: Size: 10.5cm x 9cm x 3.3cm/4.13" x 3.54" x 1.3" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Amplifier 1 x US Voltage Adapter 1 x Remote Control 1 x Strap 1 x English User Manual With USB and TF card interface, this amplifier can be directly inserted into the USB drive or TF card to play music, it supports a wide range of mainstream audio formats and can output high-definition sound quality. Using an intelligent noise reduction chip, this amplifier can filter environmental noise, and reduce the annoyance caused by noise, highly restoring the real human voice, and providing you with high-fidelity sound quality. It is constructed of ABS material. With a multi-functional design, this amplifier is remotely controlled and supports automatic recording, FM radio, and so on. The length of this amplifier is 10.5cm, the width is 9cm and the height is 3.3cm. Suitable for teaching, tour guide, promotion, training, reduce, singing machine, radio, listening to songs, storytelling, and so on, this amplifier has a wide range of applications.