Electric condenser microphone, small in size. Size: Approx. 6x5mm/0.24x0.2in. Sensitivity: 55-58dB. Omnidirectional Pickup. Frequency Range: 50-20KHz. Material: Metal. Model: 6050. Operation Voltage Range: 1.5-10V. Package includes 10 x Electret Condenser Microphones.