The ECM-90BC Ultra-Compact Dual-Diaphragm Electret Condenser Microphone from Sony is a microphone with an omnidirectional polar pattern, a flat-and-wide frequency response, and a splash-proof design that terminates in a Sony 4-pin (SMC9-4P) connector. It can be used to capture audio for live stage, theater, broadcast, and TV applications when paired with a wireless transmitter (sold separately). Additionally, the microphone includes a 3.9' cable, urethane type windscreen, and vertical and horizontal tie clips.
| Sound Field | Mono |
| Capsule | Electret Condenser |
| Polar Pattern | Omnidirectional |
| Frequency Range | 20 Hz to 20 kHz |
| Maximum SPL | 125 dB SPL Peak |
| Impedance | 2.5 Kilohms |
| Sensitivity | 38 dB at 1 kHz |
| Dynamic Range | 99 dB A-Weighted |
| Signal-to-Noise Ratio | 68 dB A-Weighted |
| Equivalent Noise Level | 26 dB A-Weighted |
| Output Connector | 4-Pin Hirose |
| Cable Length | 3.9' / 1.19 m |
| Operating Voltage | 1.1 to 10.0 V |
| Length | 0.81" / 20.5 mm |
| Diameter | 0.14" / 3.5 mm |
| Weight | 0.04 oz / 1.13 g |
| Package Weight | 0.165 lb |
| Box Dimensions (LxWxH) | 6.6 x 1.65 x 1" |