Outdoor Professional Noise-cancelling Wireless Lavalier Microphone Type-C+Apple Adapter+External Microphone 1. Channel: 2.1 2. Input voltage: 5V 3. Signal to noise ratio: 75dB 4. Bluetooth version: 2.4G 5. Battery life: more than 12 hours 6. Microphone type: condenser 7. Shell process: ABS over UV 8. Stable signal, barrier-free transmission 9. The transmitter can be equipped with an external expansion microphone 10. Frequency response range: 20Hz-20KHz 11. High-definition LED display real-time display 12. Pointing feature: omnidirectional no pointing 13. Built-in lithium battery capacity: 400mAh 14. Support dual-platform live broadcast, powerfully compatible with various devices 15. Upgrade 5.0 wireless technology, automatic frequency pairing, ready to use 16. Long battery life, intelligent noise reduction, built-in reverb, two-way monitoring, built-in accompaniment 17. Applicable objects: household, computer, camera dedicated, recording dedicated, musical instrument, radio and television dedicated, conference dedicated, interview dedicated 18. Dimensions: 100x80x12mm 19. Weight: 28.5g