Woopker Audio Amplifier Board 30-120W Support Dual Microphone Bluetooth Amplificatore Subwoof for 4Ohm Speaker 12V 24V 110V 220V Feature:- Support reading MP3 songs in TF-card / U-disk.- Independent adjustment of Treble, Bass and Master volume.- Built-in Bluetooth Receiver and FM Radio Function.- With AUX input port, can be connected to the PC/Phone/CD.- Dual microphone input, adjustable reverb.- Support Voltage AC 110V/ 220V or DC 12V/ 24V.How to Connect Bluetooth ?1. Press ''MODE'' button to switch it to Bluetooth status.2. Open phone Bluetooth, search the Bluetooth device and connect.3. You can use it after pairing successfully.Description:Type: Bluetooth AMP BoardModel: D10WBluetooth: V5.0Audio Channel: 1.0Feature: FM Radio / Treble / BassVoltage: AC 110/220V, DC 12V/24VPower: 30-120W (Deponds on Voltage)Input: Bluetooth/Lotus/U-Disk/TF/MICNOTE:1. Support AC 110V / 220V, automatic adaptation.2. If connect to DC 12V-24V, the Current needs more than 3A.Warning: Pls select only one connection method How to use Radio ?1. Hang up the Radio Antenna.2. Press ''MODE'' button to switch it to the radio state.3. Press the ''Play'' button to search the entire channel and save.4. Press the previous / next track to switch to use.TIPS: This is not professional radio, no good effect, pls understandAudio Wiring instruction :1. For subwoofer - Connect speaker about 100 magnets or 100W.2. For Tweeter - Connect to 30W tweeter (can also be disconnected, pls add a capacitor when connect).3. Suitable for 8-12 inch speakers.Notice:Please turn off the small master volume before test, then increase the volume slowly after power-on.-> If the sound is intermittent or hoarse and distorted during increasing the volume, it means the speaker and amplifier are not matched. Please use small sound or change a suitable one.Package Included:1x Bluetooth AMP Board1x Remote Control1x AC Power Cable1x DC Power Line1x Speaker Connecting LineNote: The remote's battery is not Included Question AnswerQ: Does the amplifier support 110V?A: The amplifier supports 110V and 220V AC voltage, there is a video of testing 110V voltage on the detail page.Q: Does the amplifier support karaoke?A: Yes, the amplifier supports wired microphone and wireless microphone, you can also use the microphone to sing when you play music using Bluetooth.Q: Is the amplifier powerful? Does it have a high pitch?A: The amplifier has the function of adjusting high and low tones, you can also ask for the D10 test video from the shop customer service.Q: How do I choose a suitable speaker for my amplifier?A: Generally 4 ohm resistance speakers are the most suitable, there is parameters on the back of the speakers, if you don't know how to choose, you can send it to the shop customer service, it can help youQ: Is the amplifier data in the link real?A: Yes, friend, the product picture and power wattage are real dataQ: Does the amplifier have subwoofer output?A: Sorry, my friend, there is no subwoofer output on this amplifier plate