1. DIY Kit: The DIY kit enables you to assemble the speaker yourself, providing a hands-on experience and a sense of achievement on completion. 2. LM386 Audio Amplifier: The LM386 amplifier chip enhances audio signal amplitude, optimizing your listening experience. 3. Dual Input : The speaker accepts both Bluetooth and auxiliary inputs, making it adaptable to different audio devices. 4. Level Indicator: The level indicator, also known as a spectrum feature, lets you monitor the output level of the audio signal, adding an interactive engagement for users. 5. Notice: This item is DIY KITS , You need to assemble it yourself ! Product name: LM386 Bluetooth small speaker DIY parts Power supply : DC5V (mobile phone charger/5V adapter/power bank) Power amplifier chip: LM386 Audio input: Bluetooth or audio input Auxiliary function: level indication (spectrum function) Speaker: 5W 4 ohms size: height 102 mm x length 61 mm x width 70 mm Finished product weight: 215 g After powering on, the phone searches for the Bluetooth name , and can after connecting to Bluetooth. You can also connect an external 3.5 audio cable to . Bluetooth indicator: When Bluetooth is not connected, the indicator light flashes quickly; When Bluetooth is connected, the indicator light stays on; When Bluetooth is playing, the indicator light flashes slowly. Colour:blue+transparent Material:PCB+electronic components+acrylic Package Contents: 1 x DIY KITS with case 1 x USB Power supply cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.