Hello! It is suggested to consider the trunk audio powered by motorcycle battery, which has high power, good sound quality, long battery life and powerful functions (remote control, wireless reception, microphone, etc.). ). It's just that the price is much higher than that of a low-grade portable stereo, but you will find it worth it after using it and won't regret it. It is not convenient to recommend brands here, and there will be suspicion of advertising. You can search online and choose one that suits you.