1. Wireless transmission: 2.4GHz adaptive frequency hopping
2. Working distance: 40 meters (turning), 200 meters (sight distance)
3. Microphone directivity: omnidirectional
4. Microphone frequency response range: 20Hz-20KHz
5. Input sound pressure level: 110dB SPL(MAX)
6. Input dynamic range: 86dB
7. Battery capacity: TX transmitter: 140mAh lithium battery (0.518Wh), RX receiver: 200mAh lithium battery (0.76Wh), charging box: 1400mAh lithium battery (5.18Wh)
8. Use time: TX transmitter: 8 hours, RX receiver: 8 hours, charging box: can charge 2 TX and RX twice at the same time
9. Dimensions: TX transmitter: 48 x 21.5 x 10mm, RX receiver: 48.3 x 27.6 x 11mm, charging case: 83 x 60 x 30mm
10. Weight: TX transmitter: 11.8g, RX receiver: 17.5g, charging case: 80g

Packing list:
- With charging box: charging box x 1, TX transmitter x 2, RX receiver x 1, windshield x 1, 3.5mmTRS to 3.5mmTRS audio cable (for cameras) x 1, 3.5mmTRS to USB Type-C Cable (for Android phones) x 1, 3.5mmTRS to 3.5mmTRS audio cable (for phones) x 1, manual x 1, warranty card x 1
- Without charging box: TX transmitter x 2, RX receiver x 1, windshield x 1, 3.5mmTRS to 3.5mmTRS audio cable (for cameras) x 1, 3.5mmTRS to USB Type-C cable (for Android Mobile phone) x 1, 3.5mmTRS to 3.5mmTRS audio cable (for mobile phones) x 1, manual x 1, warranty card x 1