❃❃ Item: MP3 Player Audio Voice Module. | ❃❃ The DFPlayer perfectly integrates hard decoding module, which supports common audio formats such as MP3, WAV and WMA. Besides, it also supports TF card with FAT16, FAT32 file system. | ❃❃ Supported Sampling Rates (kHz): 8/11.025/12/16/22.05/24/32/44.1/48; 24 -bit DAC output, support for dynamic range 90dB , SNR support 85dB. | ❃❃ You can play the designated music without any other tedious underlying operations by a simple serial port. | ❃❃ Control modes: I/O control mode, serial mode, AD button control mode.

❃❃ Fan size: 40x40x10mm(L*W*H); Rated Voltage: 5V DC, Current: 0.21A. | ❃❃ Airflow: 3CFM, Speed: 4200±5%PRM, Noise: 22 DBA. | ❃❃ Bearing Type: Oil Bearing. | ❃❃ Lead Wire: USB; Length: Approx.1m / 39.37 in. | ❃❃ Package Included: 4 * DC brushless fans.(Notice: 'DO NOT GET WET' or 'Put it in a humid environment'; Or it will stop working. Any questions, you can contact us and we will help you.)

It can be wildly used to wireless remote control, somatosensory devices, RFID, NFC, smart grid, smart home, wireless audio etc. | 5PCS NRF24L01 8 Pin Socket Breakout Adapter Board: On-board AMS1117-3.3 chip, a simple socket breakout board which is for 8-Pin NRF24L01 wireless module | 5PCS NRF24L01+PA+LNA RF Transceiver Module with SMA Antenna: Built-in 2.4Ghz antenna: available software to set the address, only received local address when output data(Provide interrupt instruction), can be directly connected to a variety of microcontrollers | RF24L01+ Breakout Adapter: Small power on SMD LED indicator, On-board 3.3V voltage regulator, which accepts +5V power supply input and provides 3.3V for the attached "nRF24L01+" module. | The packing list includes: 5 * NRF24L01+PA+LNA Wireless Transceiver RF Transceiver Module; 5* SMA Antenna 2.4G 1100m; 5 * NRF24L01+ Breakout Adapter

✹✹TEC1-12703 Thermoelectric Cooler Cooling Plate Module 12V 3A. | ✹✹Total Size:40 x 40 x 4mm/1.6" x 1.6" x 0.16"(L*W*H). | ✹✹Vmax:15.5V;Qcmax:27W;Tmax(Qc=0):up to 60°C. | ✹✹they are Lightweight and durable，Suitable for manufacture in small size. | ✹✹Semiconductor coolers are a form of solid state cooling that incorporates both semiconductor technologies and electronic assembly techniques