• Splash proof: IPX4
• Bluetooth version: V3.0+EDR  
• Transmitting range: about 10m
• Frequency: 2402MHz-2480MHz
• Working time: about 3 hours
• Charging time: about 3 hours
• Data transmission: 2.1 Mbps
• Input sensitivity: 300MV
• Signal to noise ratio: 84Db
• Sound output: 2.0 amplifier output
• Power supply: built-in rechargeable battery
• Speaker unit:  40mm, 4Ohm, 3w
• USB cable length: 31.5inch
• Mount diameter: 2.5cm

Package included:

• 1 x Splash-proof Wireless Bluetooth Bicycle Tube Mount Speaker with Mic - Red
• 1 x Micro USB cable 
• Accessory only, device not included