RIENOK 30W Bluetooth Speaker Wireless Portable Waterproof Classic Black\nProduct Details\n--Hi-Fi Stereo Sound: Pairing two 30W portable bluetooth speakers simultaneously to truly enjoy the surround sound of a movie theater with the True Wireless Stereo function. You can take the loud bluetooth speaker and enjoy it in the caravan awning, picnics, garden, etc.\n--Ultra Portable and 10 Hours Playtime: With a built-in 2500mAh rechargeable lithium battery, the wireless bluetooth speaker provides you for 7-10 hours per charge(Based on 50% volume level, and actual playing time varies by music genres)\n--Bluetooth 5.3 Wider Compatibility: The advanced Bluetooth 5.3 chip provides stabler devices connection. Easily pair with most devices, such as iPhone, Samsung, MP3, laptop. Support SD Card(Up to128G), AUX. Built-in microphone is perfect for hands-free calls. The loud bluetooth speaker comes with a loop, it can be hung on the bike when ridding\n--RGB Lights Speaker: Multi-color lights injects