occkic | DC 5V/3.7V TWS Stereo Bluetooth Power Amplifier Board High Sound Quality Dual Channel 2x10w Sound Module Car Speakers

Product Features:1. Stereo dual channel, Bluetooth sound card dual-mode input2. Bluetooth 5.1 wireless connection, stable transmission of stereo audio signals3. Supports 2 * 10W output, 4 Ω speaker compatible with powerful driver4. Supports dual power supply of 3.7V battery and DC5V, flexible adaptation to various scenarios5. Suitable for portable speakers and DIY Bluetooth speaker projectsProduct Parameters:Chip type: StereoNumber of channels: 2 channelsAudio input: wireless Bluetooth/wired sound cardCompatible power supply: 3.7V battery/DC5V (note: voltage should not exceed 5V)Speaker: Suitable for 4 Ω speakers (2 Ω speakers cannot be used)Bluetooth version: 5.1Output power: 2 * 10W (with distortion up to 2 * 10.6W)Output impedance: 4 ΩPower on standby power consumption: less than 35MAShutdown standby power consumption: less than 25UACharging power: 0.8 ± 0.1ACharging temperature rise:3000MAH battery life reference dual 4 Ω speaker default EQ: half volume, normal song>20 hours; Maximum volume normal song>8 hoursMobile Bluetooth connection distance: ≥ 10 meters in non-metallic sealed conditions for transmission and receptionDecoding: Basic SBCProtection mechanism: over temperature and over currentMotherboard size 39 * 46mm; thickness 12mmProduct Description:It is strictly prohibited to use hot melt adhesiveThe socket charging extension light, if it is not a red light, the red light of the motherboard needs to be removed to turn on. In addition, the extension charging light will not turn off when fully charged,If you want to fully turn off the lights, you need to connect the wires at both ends of the red light beads on the motherboard.Be sure to use batteries with a 3.7V overcurrent rating of 5A or higher and a protective board. Otherwise, the maximum volume battery will protect it.When using a 5V3A power supply without a battery and with wired power, the volume cannot exceed 50%, otherwise it will restart,The signal-to-noise ratio of the amplifier is 67, which means that when the volume is very low, white noise can be heard at a distance of about ten centimeters from the speaker. Remember not to shoot if you mind.The tuning software does not support WIN7 and below systemsSupport 30 5VRGB expansion chipsHide the volume adjustment padCan charge the batteryPowered by a single power batterySupport computer tuning to save EQ10 segment EQ gain with DRC dynamic compressionPower button (click power on, long press power off, three clicks TWS pairing, four clicks to clear TWS pairing)M key (single machine light switch, double-click next track, triple click previous track, long press sound card Bluetooth switch)Integrated inductor with black gold capacitorAnnotation: Bottom noise explanation, do not take pictures if you mind① High sensitivity horn② In a quiet environment, the straight distance is less than 30CM③ Under the minimum volume condition, you may hear Sasanian noise***Power supply requirements:1. The battery input is 3.3-4.2V, and the current requirement for the battery plug input to the motherboard is continuous discharge of 5A and instantaneous 8A. For example, a 5C battery with 2000MAH and a 3C battery with 3000MAH.Battery protection board: requires 4 or more 8-pin MOSFETs2. The adjustable power supply is connected to a battery socket, with a voltage requirement of 3.3V-4.2V, and a current greater than 14A is needed to meet the instantaneous load requirement.3. Cannot power on without batteryBattery cable requirements: The cable should be thicker than 22 # and less than 200mm (Frequently Asked Questions and Answers① The reason for the loud noise causing the restart to stall and shut down is insufficient power supply - please refer to the power supply requirements, verify the battery, protection board, and battery line parameters. (Note: Currently, there is a 1/3000 proportion of cases where loud speakers cause the motherboard to restart, and the copper wire that costs over one yuan is very thin.) There are no other reasons besides this.② How to pair? ---Disconnect the phone, turn on the speaker, quickly press the power button three times to start a team - wait for 10 seconds to search for Bluetooth connection again. The initiator of the team is the left channel. Four hits cancel pairing.③ The sound feels very low - very few, the phone needs to enable Bluetooth volume synchronization function - Settings - Bluetooth - Expansion - Check volumeSynchronize or absolute volume, or connect a touch switch control on the reserved volume pad on the motherboard.Product List:1x module2x speaker cables (optional)