Wireless Bluetooth Speaker Bluetooth Speaker Subwoofer Portable Subwoofer Sport Speaker Bluetooth Speaker Hand Free Waterproof

Description:Bluetooth: Bluetooth V4.1+EDRFrequency range: 2.4GHZ-2.480GHZSensitivity: 4DBmReceiving range: more than -82DBmTransmission rate: up to 3.0MbpsBattery: Polymer Battery 500mAhCharging interface: standard USB (mini 5pin)Charging current: 450mACharging voltage: 4.8-5.5VCharging time: <2.5 hoursMusic playback: up to 2 hours (85DB volume)Output internal resistance: 4R3W * 2Effective range: up to 10 metersInput power: 20-100mWOutput power: 3W * 2Output device: Φ40mm speakerResponse frequency: 100HZ-20KHZInput range: 50-700mVDistortion: Less than 10%Signal to noise ratio: greater than 65dbSize: 70x65mm