Bluetooth version: 4.2 Support MP3/TF/handsfree phone DC: built-in rechargeable 18650 battery 2400mAh Bluetooth distance: 10m product size:208*73*67mm Up to 3 hours of continuous play Speaker nominal impedance: 4Ω 3W Frequency response: 280Hz-16kHz Built-in mic, handsfree for phone
