Recording function - Key recording instructions: In the U disk/TF card music playback mode, long press the mode button to record. Long press the mode button again during recording. FM radio - The external antenna signal is stronger and better, the default frequency band is 87.5MHZ-108.0MHZ. Bluetooth 5.0 supports calls - Stronger signal, more stable transmission, supports 10 meters away infrared remote control operation. Dynamic and good sound quality - The Bluetooth module comes with an amplifier, loud and undistorted, with LED colored lights that change with the frequency of the music, the atmosphere is full and the sound is touching. Working voltage:DC 5V (it is recommended to use a 2A mobile phone fast charging head for power supply) Working current:greater than 1A (the working current is different for different radio stations and different music) Static working current:about 40mA (no music playing) Output power:2x3W Bluetooth connection name:JQ BT Use anti-breaking sound amplifier chip, loud and undistorted The purchased parts require a certain welding foundation and patience Working current:quiet less than 10mA, full load not less than 500mA This Electronic DIY kit helps you to learn basic electronic knowledge and circuit principles, and practice soldering skills enjoyablely for you and your kids, or students, or DIYers. Note:Due to different production batches, there are slight differences between the actual product and the picture, which will not affect normal use. Colour:As Shown Material:Plastic Package Contents: 2 x DIY Bluetooth Speaker Kit(DIY parts, need to be welded by yourself)