Product Features: Wireless Stereo Sound: Delivers crystal-clear sound with deep bass. 3H HiFi: High-fidelity music experience. Colorful Changing Lights: Integrated RGB lighting for an immersive audio-visual experience. Multiple Connectivity Options: Supports USB, TF card, AUX, FM, and wireless connections. Hands-Free Function: Can be used for voice calls. Technical Specifications: Wireless Transmission Range: 10 meters Audio Noise Ratio: ≥80dB Battery Capacity: Approximately 1200mAh Built-in Voltage: 3.7V Play Time: Around 3 hours (varies with volume and LED usage) Charging Time: About 4 hours Charging Voltage: 5V/500mA Frequency Response: 120Hz – 20KHz Product Dimensions: 111 x 111 x 89 mm Weight: Approximately 332g per unit Additional Information: Certifications: CE, FCC, RoHS compliant Manufactured in China Website: www.hsunjpin.com (as seen on the packaging) Supports L2CAP/A2DP/AVCTP for enhanced audio transmission