-------------Product Feature---------------- 1. Material: ABS + aluminum alloy 2. Size: 235*88*88mm, Weight: 285g 3. Speaker diameter : 45mm 4. Wireless version: bluetooth V4.2JL, 5. Battery capacity:1800mAh, the18650 battery inside can be removed ,the charging time: 3hours,music playing time:5hours 6. With KTV reverberation effect, this music microphone can connect to the phone via bluetooth, which supports TF card playback, and the maximum capacity of TF is no more than 32gb"