RGB colorful light and shadow show: Stunning high. saturation RGB light effects, multi-dimensional feeling of the charm of music, coupled with surging music, bring you a pleasant atmosphere IP67 waterproof and dust-proof no fear of rain and dust: Nylon+Polyester material net cover closed design, no fear of rain washing, whether you are camping outdoors, walking on the beach, or playing at the seaside HiFi lossless stereo sound quality special sound unit: Equipped with high-level audio components, dual 67mm large speakers, and metal dual diaphragms, which transmit sound accurately and clearly, allowing you to experience immersive music in depth Large capacity battery no worry about battery: Built-in 8000mAh large battery, long-lasting battery life, music will always be with you Newly upgraded Bluetooth 5.2 technology: A new generation of Bluetooth 5.2 connection technology, stable transmission within 10 meters, faster and more stable connection, low power consumption, no freeze, continuous connection, compatible with most smart devices Specifications: Transmission range: 10m Charging voltage: DC 5V Frequency response: 20Hz- 20kHz Working voltage: 7.4V Bluetooth version: 5.2 Battery capacity: 8000mAh Speaker: Φ 67mm*2 Music time: about 5H (varies depending on audio content and volume) S/N ratio: ≥85dB Distortion degree: < 1% Product size: 228 x 103 x 105 mm Product weight: 997g