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  • Amplifier IC: PAM8403
  • Operating Voltage: 2.5V-5V
  • Amplification Efficiency: 85%
  • Dimension(LxW): 21x18 mm
  • Load: 4 ohm or 8 ohm small speakers
  • Supports: USB, AUX, SD-Card, Bluetooth
  • Power: 5W
  • Input Voltage: DC 5V 
  • Size: 38x38mm
  • Supply voltage: 5v
  • I2c address:  0x20~0x27
  • Backlight: Shorting Jumper to ON/OFF
  • IC: PAM8610
  • Input Voltage: 7-15 V
  • Working Mode: Class D (PWM modulation type)
  • Power: 15W
  • Dimension(LxW): 30.5x25.5 (mm)
  • Voltage Supply: 2.2V-5.5V
  • Active Supply Current: 200-300µA
  • DS3231 based RTC with 2032 Battery Holder.
  • Highly Accurate RTC
  • Real-Time Clock Counts
  • Product: PL2303 USB to TTL Serial Converter
  • Model: Pl2303HX
  • Linux Supply voltage: 3.3V to 5V
  • 500mA self-recovery fuse for protection
  • Connection Supports: Bluetooth/ USB/ AUX/ Memory Card
  • Output: 5W
  • Input Voltage: 5V DC
  • Size: 45x25
  • DS1307 based RTC Module.
  • 1Hz output pin.
  • Consumes less than 500nA in battery backup mode with oscillator running
  • Underwriters Laboratory (UL) recognized
  • 56 Byte Non-Volatile RAM for data storage
  • On board TDA2030A Audio amplifier Board
  • Mono channel 18W Power amplifier circuit design
  • On board horn socket
  • On board 10 k adjustable resistance, can adjust the volume of the amplification
  • On board power indicator light
  • Working voltage: DC 3.3-5 V
  • Op-Amp IC: LM393
  • Induction distance: 0.5M
  • Board PCB Size: 34 x 16 mm
  • Output Type:  Both Analog and Digital
  • Main Chip: ISD1820
  • Dimension (mm): 43x43x11 (LxWxH)
  • Working Voltage: 3V-5V DC
  • Loudspeaker: 8 ohm 0.5W
  • Voice Recording Time: 10 seconds
  • Operating Voltage    4.5-5.5 volts (3.3 volt onboard regulator)
  • Communication    SPI
  • 4 M2 screw positioning holes for easy installation


  • Operating voltage: 5V
  • On-board MAX485 chip
  • Convenient RS-485 communication wiring
  • Multiple Units can be connected to the same RS-485 bus wiring.
  • Board size: 44 x 14mm
  • Input Supply voltage: 3.2 ~ 5V DC
  • DAC output: 24-bit
  • SNR: 85 dB
  • Supports sampling rates (kHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48
  • Operating Temperature (°C): -40 ~ +70