| Basic Information | ||
| Noise/Signal | 82 DB | |
| Microphone Type | 2.4GHz | |
| BASIC INFORMATION | ||
| Battery | Built-in Li-ion Battery or USB< DC 5V Approx. 6 hours |
|
| Main Spec | ||
| Frequency Range | 50Hz-8.5KHz | |
| Sensitivity | Built-in Microphone: -39dB±2dB (0dB=1V/Pa@lkHz) |
|
| Polar pattern | Omnidirectional | |
| Using the Microphone | ||
| Audio recorders | Yes | |
| PC | Yes | |
| WARRANTY INFORMATION | ||
| Warranty | 1 year | |

Innovative Line Input on Transmitter
In addition, the transmitter comes with a line input jack that allows it to accept audio like background music from external devices. This will be to a little benefit of post-production when recording with appropriate line input audio.
Compact Body with Powerful Ability
Both transmitter and receiver are company and light, each one only about 47g (1.7oz), the BY-WM4 Pro K2 works about 6 hours and operation distance is up to 60m (197ft) without obstacles.
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