Specifications Separate analog, digital, and IO power supply Serial data and control interface (SPI) 1 headphone and audio output interface 1 microphone for recording, support audio encoding format 1 line input interface; supports MP3 and WAV stream
Features: Amplifier Chip:TPA3110 Output Power:15W x 2 Working Voltage: DC 8-18V Working Current: Max:3A Static state:8mA Efficiency:≥90% SNR:100dB Frequency Range:20Hz-20KHz Size: 33 x 25 x 3.5mm Speaker:4-8Ω Net Weight:about 4g
USB powered Universal Micro USB 5V power supply 3.7-5V Supply Pad External 3.7-5V lithium battery power conversion LED indicator Bluetooth mode long blue light 3.5mm stereo audio interface Standard 3.5mm interface, output stereo sound source, plug in headphones, connect amplifiers and other devices
Features: * Superior sound quality.Onboard 2Wmonoamplifier(5V power of up to 3W) is directlyconnected to the speaker(recommendation 4O3Wspeakers),3.5mm gold plated headphone jackcan connect with headphones or external audio.
5v Active Buzzer Magnetic Long Continous Beep Tone Alarm Ringer 12mm MINI Active Piezo Buzzers