I purchased this new but only used it once for an experiment, so I'm selling it. A set of various electronic components and colorful jumper wires, perfect for DIY projects, mainly for music. Rakstore MAX98306 Sensor Stereo Class D Amplifier Adafruit class D amplifier 3w MAX98357A I2S Useful and practical 3pcs Mini MP3 Player Module DFPlayer MP3-TF-16P Support MP3 / WAV/WMA TF Card FAT16 / 32 with Simplified Output Speaker Xsdjasd Mini Power Amplifier Board 5W+5W HiFi 2-channel PM CM2038 5V USB Power Audio Amplifier Samcos Jumper Wires Approximately 120 pieces Jumper Wires Connector Line Wire Kit Male-Male Breadboard Jumper Wires (Female-Female) (20cm) 31 pieces The MAX98306 stereo 3.7W class D amplifier provides class AB audio performance and class D efficiency. The device sets five optional gain settings (6dB, 9dB, 12dB, 15dB, 18dB) through the gain selection input (GAIN). The quiescent current of the IC and the 3.7 V power supply of 2.0 mA extend battery life in portable applications. Maximum output: 5V. Gain: Default 6db. - Components: Electronic circuit board, potentiometer, USB port, connection terminals - Wires: Jumper wires, colorful, various lengths - Modules: Sensors, driver boards, multiple modules - Applications: DIY projects, electronic work, robot creation Thank you for looking.