Description: This teacher loudspeaker is equipped with a clear display screen, which can display the functional mode, playback time and recording duration. Adopting double noise reduction headset design, this teacher loudspeaker has clear sound, high sensitivity, low distortion and strong directivity. It is constructed of plastic material. The length of this product is 12cm and width is 8.5cm. It is suitable for training of lectures, tour guides, shopping guides and conferences. Item Name: Teacher Loudspeaker Material: Plastic Output Power: 3W Signal to Noise Ratio: ≥ 75dB Frequency Response Range: 100HZ-18KHZ Battery Capacity: 1500mAh (Included) Number of Speakers: 1 Bluetooth-compatible Protocol: 5.0 Playback Duration: 6-8 Hours Playback Format: MP3, WAV, WMA Features: Clear Display Screen, High Sensitivity, Low Distortion Size Details: L: 12cm/4.72", W: 8.5cm/3.35"(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 Teacher Loudspeaker 1 x Charging Cable 1 x Headset 1 x User Manual 1 x Lanyard