<ul><li><p>Built-in long-lasting battery life, long-term use of uninterrupted power, built-in 80mAh battery, long-lasting life of 10 hours, short video recording, live recording, unrestrained, easy to deal with various noisy environments</p></li><li><p>20 meters barrier-free connection, recording more freedom, high-performance wireless microphone, stable signal, a barrier-free distance of more than 20 meters, free recording is not limited</p></li><li><p>Intelligent noise reduction, built-in decoding chip, built-in noise reduction chip, strong anti-interference ability, effectively identify the original sound, and can still record clearly in a noisy environment</p></li></ul><p><strong>Specification:</strong></p><ul><li><p>Frequency range: 2.4GHz</p></li><li><p>Transmitter working current: 11~12mA</p></li><li><p>Boot current: 10~11mA</p></li><li><p>Working current of receiving end: 20~21mA</p></li><li><p>Power-on current at the receiving end: 8~9mA</p></li><li><p>Shutdown current: 2~3uA</p></li><li><p>Working temperature: -10~45mA</p></li><li><p>Charging input voltage: DC4.8~5.4v</p></li><li><p>Working time: about 6H</p></li><li><p>Charging port: TYPE-C</p></li><li><p>Charging time: about 90min</p></li><li><p>Charging current: about 60mA</p></li><li><p>Battery capacity: battery 80mAh</p></li><li><p>Full battery voltage: 4.1~4.25V</p></li><li><p>Transmission distance: 20 meters barrier-free distance</p></li><li><p>Human obstacle distance: 7 meters</p></li><li><p>Left and right signal-to-noise ratio: 64 dBm</p></li><li><p>Transmission delay: 30MS</p></li><li><p>Sensitivity (microphone): -42dB</p></li><li><p>Microphone head: Silicone</p></li><li><p>Antenna type: ceramic antenna</p></li><li><p>Frequency response range: 20-20KHZ</p></li></ul>