How about Langting Audio in Germany?

Hello, the most cost-effective, compact, safe and environmentally friendly lithium battery, with long battery life, digital amplification board, stable quality, small size and loud sound, is an essential artifact for square dance, outdoor activities, indoor teaching and so on. Advantages: 1, wide sound coverage, wide use, simple operation and convenient use. 2, equipped with high-strength steel mesh horn protection cover, high and low frequency division unit horn. 3, built-in rechargeable battery, can be used after charging, or directly connected to 220v AC.