ISD1820 recording module voice module the voice board telediphone module board with Microphones + Loudspeaker With looping, jog playback, single-pass play function Available single-chip control This module can directly drive a small speaker 8 ohm 0.5W Working voltage: DC 3 to 5V Loudspeaker: 8Ω, 0.5W Power supply: 3 - 5V Size: 3.7 x 4.1cm / 1.45 x 1.61 inch ISD1820 recording module voice module the voice board telediphone module board with Microphones + Loudspeaker With looping, jog playback, single-pass play function Available single-chip control This module can directly drive a small speaker 8 ohm 0.5W Working voltage: DC 3 to 5V Loudspeaker: 8Ω, 0.5W Power supply: 3 - 5V Size: 3.7 x 4.1cm / 1.45 x 1.61 inch ISD1820 recording module voice module the voice board telediphone module board with Microphones + Loudspeaker With looping, jog playback, single-pass play function Available single-chip control This module can directly drive a small speaker 8 ohm 0.5W Working voltage: DC 3 to 5V Loudspeaker: 8Ω, 0.5W Power supply: 3 - 5V Size: 3.7 x 4.1cm / 1.45 x 1.61 inch polybag