features compact size, high output power and long playtime. It is perfect for teaching, touring guiding, market promotion, etc. Features: Digital circuitry technology, 12W max.output power. Supports music playing function, can play audio files stored in USB disk and TF card. Adopts LOW-THD AT Adaptive Technology, features low distortion even at high output power. Built-in high capacity rechargeable lithium-ion battery, fast charging and long time playing. Built-in MCU intelligent recharging management system for secure battery charging and discharging. With 3.5mm AUX IN jack for connecting DVD/ MP3 music signal to the amplifier, can be used as an active speaker. Suitable for tour guiding, teaching, presentation, market promotion, morning exercise, etc.