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 Method: 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 partsPower supply method: DC5V (mobile phone charger/5V adapter/power bank)Power amplifier chip: LM386Audio input: Bluetooth or audio inputAuxiliary function: level indication (spectrum function)Speaker: 5W 4 ohmsShell size: height 102 mm x length 61 mm x width 70 mmFinished product weight: 215 gAfter 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+transparentMaterial:PCB+electronic components+acrylicPackage Contents:1 x DIY KITS with case1 x USB Power supply cableOnly 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.