Microphone 9.4 x 6.7mm

From the shop's description

Electret microphone is a sound- electrical conversion device. It is used in telephones,wireless telephones, mobile phones, ear-telephones, recorders, radio recorders, alarms, voice control toys, voice control switches and more Note: Check photo below to find the ground Specifications: Size: 9.7 x 6.7mm Directivity: omnidirectional Connection: solder type Sensitivity: -28 to -58dB Standard operating voltage: 3V Impedance: 2.2K Ω