AIYIMA 2Pcs 40MM Mini Audio Portable Speakers 16 Core 4 Ohm 5W Full Range Speaker Rubber Side NdFeB Magnetic Speaker

Communication : AUXBattery : NoSpeaker Type : CombinationPower Source : NoneNumber of Loudspeaker Enclosure : 2Certification : CE,RoHSCabinet Material : MetalAudio Crossover : Full-RangeChannels : 2 (2.0)Input Power(W) : <25 WIntelligent Personal Assistant : NONEOutput Power : OtherRemote Control : NoSupport Memory Card : NoPlayback Function : NoneDisplay Screen : NoVoice Control : NoMaterial : MetalSupport Apt-x : NoWi-Fi Music : NoneDisplay Screen : NoWaterproof : NoBuilt-in Microphone : NoPMPO : 5WSupport APP : NoFeature : NoneModel Number : NoneFrequency Range : OtherIntelligent Personal Assistant : None A: 40mm 4 Ohm 5W Mini Speaker   Category: Electric (moving) Uses: Bluetooth speakers Shape: round Composition: combination of cone Diaphragm material: non-paper Magnetic circuit form: double magnetic type Frequency characteristics: full band (full range) Rated power: 5 (W) Rated impedance: 4 (Ω) Frequency response: 150hz-20 (kHz)Sensitivity: 80 (dB / W)     B: 5Wx2 Bluetooth 5.0 Decoder Amp Board   1. DC3.7 Power supply (dual MOS battery) recommended 1-3A 2. Support FM radio function, automatically search for radio stations and store 3. Support AUX input function 4. Support full function operation of infrared remote control 5. Support LED digital screen real-time display of full function status 6. Support USB / TF / radio / AUX automatic switching 7.mp3 / WAV / WMA song decoding chip 8. Support FAT16, FAT32 file system 9. Support 32-320kbps mp3 songs 10. Support power-off memory function: memory song and volume before power-off 11. The product board with power amplifier 2 * 5W ,it can directly drive a pair of 4 ohm 3w or 2 ohm 5w speakers   Panel key function description: 1. "PREV / VOL-" set long press to decrease the volume; short press in USB / SD / radio mode for the previous song / previous radio station 2. Short press “PLA / PAU” in USB / SD mode to play / pause; short press in radio mode to automatically search for and store 3. "NEXT / VOL +" set long press volume plus; short press in USB / SD / radio mode for next song / next station 4. "MODE" is the mode switching, the switching sequence is: USB → SD → radio → AUX: when there is U disk and SD card: the switching sequence is USB → SD → radio → AUX; when only U disk: the switching sequence is SD → Radio → AUX; when only SD: switch order is USB → Radio → AUX; when there is no U disk and SD card: switch order is radio     C: PAM8403 Bluetooth 5.0 power amplifier board   Input voltage: DC5V Output power: 5Wx2 Audio input: Bluetooth 5.0 Amplifier Chip:PAM8403 Number of channels: two channels Gain:4 Size: 45*42*25MM Installation aperture: 3MM