The Xadow Audio integrates a speaker box and a microphone on one single board. The speaker unit is rated at 0.7Watt with an impedance of 8 ohm. Unlike the common cone type speakers, the loudspeaker driver used on the Xadow Audio has a flat surface and is mounted in a rectangular enclosure, which enables it to reproduce sounds at an amazing effect. Include Xadow Audio *1 FPC Cable 35 PIN * 2Features: Open source and modular design Built-in enclosure for speaker Combines speaker and microphone on one board Built-in Xadow Connectors for easy pluggable FPC cables Stackable and chainable with other Xadow Modules Perfect choice for your audio and DIY Phone projectsSpeaker Box: Resonant Frequency: 900 Hz Impedance: 8±20% Ω Rated Power: 0.7 W MAX. Power: 1 W Frequency Range: 900 Hz to 20 kHz Microphone: Microphone Sensitivity: -42dBV Typ. Max Input Sound Pressure: 130dB SPL Dimensions: Speaker: 13mm X 18mm X 4.5mm / 0.51” X 0.71” X 0.18” Microphone: 2.95mm X 3.76mm / 0.12” X 0.15” Board: 25.37mm X 20.30mm / 1’’ X 0.8’’