Large 3inch speaker, with 360 degree pickup, surround sound, digital amplifier chip, clear and accurate sound. Build in 2200mAh high-capacity battery for long time use. Intelligent digital display, supports USB and memory card playback, can connection to computers, tablets, and mobile phones. Small size and portable, easy to carry and use. Equipped with earphone, ergonomically designing for comfortable wearing. Suitable for multiple scenario, it can be used for teaching tourist guides, gatherings, speeches, training, promotions, Equipped with hanging rope and buckle, it can be used for both tying and hanging, with adjustable length. Size: . 9.2x8.4x2.8cm/3.62x3.31x1.1in Product Name: Multifunctional Voice Amplifier Function: Supports microphone, memory card insertion for playback, screen digital display, supports recording function Battery: 2200mAh 18650 Battery Charging time: about 3hrs Color: White Material: plastic Package Contents: 1 * Speakerphone 1 * Wired Headset 1 * Belt 1 * Charging Cable 1 * English instruction manual 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.