Feature: 1. BT voice amplifier, and light, easy to carry. Support BT to connect mobile phone and play music. 2. Small appearance, but the volume is higher than that of mainstream loudspeakers. The double voice coil design makes the volume larger without distortion. 3. More practical functions, enrich your work and life. Support FM radio, one key recording. Can insert TF card to play. 4. Release your hand, convenient to use. Built-in rechargeable 1000mAh battery, easy to charge with USB cable. 5. Widely used in teaching, training, tour guide, conference, promotion and other occasions. Specification: Features: BT voice amplifier, and light, easy to carry. Support BT to connect mobile phone and play music. Small appearance, but the volume is higher than that of mainstream loudspeakers. The double voice coil design makes the volume larger without distortion. More practical functions, enrich your work and life. Support FM radio, one key recording. Can insert TF card to play. Release your hand, convenient to use. Built-in rechargeable 1000mAh battery, easy to charge with USB cable. Widely used in teaching, training, tour guide, conference, promotion and other occasions. Specifications: Color: Red/Black(optional) Battery: Built-in 3.7V 1000mAh Lithium Battery Item Size: 10.5 * 7.5 * 2.8cm / 4.1 * 3.0 * 1.1in Item Weight: 128g / 4.5oz Package Size: 12.5 * 19 * 5.5cm / 4.9 * 7.5 * 2.2in Package Weight: 380g / 13.4oz Note: TF card is not included. Packing List: 1 * Voice Amplifier 1 * Wired Microphone 1 * USB Charging Cable 1 * Waistband Package List: 1 * Voice Amplifier 1 * Wired Microphone 1 * USB Charging Cable 1 * Waistband