High-fidelity Audio codec. Dual microphone input. TRS+TRRS Dual 3.5mm jacks. CTIA/OMTP interface switch. MCU: STM32G030F6P6 @ 12C Address: 0x33 Audio codec: ES8388 @ 12C Address: 0x10 Audio input/output: 2 microphone inputs, 1 stereo headphone output (HPOUT_L/HPOUT_R) Jack type: 1xTRS (microphone only), 1XTRRS (microphone/speaker Combo jack) Status indicator: 3 x WS2812C_2020 Headphone standard switch: CTIA(/OMTP Operating current: DC 3.3V@23.53mA Standby current: DC 3.3V@8.58mA Operating temperature: 0C-40C (Different batches may result in different printing screens, which not affect the use) Color: Black & Gray Material: PCB+Plastic Package Contents: 1 * Audio Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.