Product descriptions: Children singing karaoke microphone gifts The microphone tracks music, creating a comprehensive, versatile Bluetooth microphone that allows music lovers and people who love life to do whatever you want. This is the dedication of the microphone. This is your best gift for your child. High quality built-in lithium battery It can be 5-9 hours after fully charged. Advanced microphone with 2-channel stereo speakers You can connect your smartphone via Bluetooth or insert a TF card with up to 8GB (not in the Included in delivery). High quality noise reduction. Stunning KTV live sound, clear music rhythm and echo reverb Easy to use Bluetooth or 3.5mm plug span> Compatible with almost all Bluetooth devices on the market, easy to use and pair, and with a 3.5mm audio jack, which can be connected to Android and iOS phones. This is no ordinary microphone. You can sing and record anytime, anywhere. Specifications: Material: Aluminum alloy Weight: 350 grams Product size: 9.45 * 2.95 * 2.36 inches Battery capacity: 1800mAh Power supply: built-in lithium-ion battery Charging time: 3 hours< /p> Usage time: 6-9 hours Transmission range : 12 meters Output power: 5 W (speaker output) Speaker frequency: 100Hz-10KHz Charging: DC 5V / 1A Maximum sound pressure level&gt; 115 dB 1 kHz THD &lt;1% Reverb mode: Echo < span style="font-size: 1px;">The package: 1X Bluetooth microphone 1X USB data cable 1X audio data cable 1X User Guide