Rockville R-GO 16 Watt Waterproof Portable Bluetooth Speaker+Bicycle Bar Mount, Bluetooth version 5.3 with 40 Foot wireless range and A2DP high definition streaming, Includes wireless microphone with volume, voice changer, vocal cancellation, auto-pitch, reverb etc, TWS – True Wireless Stereo linking of 2 speakers together, Rated power：8W RMS and 16w Peak, Waterproof level:IP67 (Submergible), Bar-mount bracket is perfect for bikes, or mounting to another bar Extremely loud and powerful in a handheld compact size, Built in microphone function for phone calls, Can be used as a laptop or computer speaker with the included USB-C cable, Perfect for zoom or conference calls on-the-go, TF memory card playback (Maximum 32GB, Plays audio formats MP3, WMA, WAV), S/N Ratio：≥85dB, Battery capacity：1800mAh, Battery life: 24 Hours at 20% volume, 12 hours at 40% volume, 4.5 Hours at 100% volume, Quick Charging time：2.5-3h , Frequency Response：100Hz-18kHz Charges with included USB Type-C cable, Mic and Bluetooth speaker charge together with the included USB cable, Goes very loud for the compact size, Material: 100% ROHS Silicone & ABS with fabric grill, Perfect for running, camping, hiking, pool, beach, shower, bedroom, iPad/Laptop speaker, kitchen and many other applications, Automatically remembers and syncs with previously synced devices Playback Controls - Play, Pause, Skip Forward, Skip Back, Volume Up, Volume Down, Will control next song, pause, play on popular apps like Pandora, Spotify, and others, Circular design fits in the palm of your hand or in your pocket, Rugged and Shockproof! Rubberized impact-resistant rubber feet for great sound when placing speaker on any hard surface, Great sound quality with very low distortion, Dimensions of Unit (inches): 4" x 4" x 2" Height, Unit Weight: 0.6 pounds