AY123 2.4G Wireless Lavalier Microphone with Digital Display Features: 1. Two-channel synchronous transmission without delay 2. Built-in high-performance large-capacity polymer lithium battery, safe and reliable 3. Using ultra-low power consumption main control chip, 7 hours of uninterrupted work 4. No delay transmission to ensure the synchronization of audio and video 5. Support noise reduction function 6. The receiver display screen design is convenient for status checking and function control 7. Support mono and stereo switching 8. Support one-key mute, cut off non-essential audio recording at any time 9. Support volume adjustment 10. Support external microphone Notice: 1. When using video cameras, SLR cameras and other equipment, they can be directly connected through the 3.5mm TRS audio conversion cable 2. When using iOS mobile phones, tablets and other devices, you can use 8 Pin to 3.5mm audio cable (not included) and use with 3.5mm TRS to TRRS audio cable (included) 3. When using Type-C interface Android phones, tablets and other devices, you can use Type-C to 3.5mm audio cable (not included) and use with 3.5mm TRS to TRRS audio cable connection (included) Specifications: 1. Transmission distance: 70 m (max) 2. Battery capacity: 250mAh polymer lithium battery 3. Charging power: 5V200mA 4. Output level: 1.7Vp-p 5. Radio frequency: 2.4GHz; transmit power.: 14DB 6. Audio gain: 0-4 level; SNR: 97DB; receiving sensitivity: -95DB 7. Frequency response range: 20Hz-14.5KHz; noise reduction level: 0-75Hz-150Hz 8. Microphone: capacitive omnidirectional 9. Output impedance: about 47 ohms (at 32 ohm load) 10. Working environment temperature range: -40-50 degrees Celsius; working environment temperature range: 90% RH (non-condensing) 11. Product size: 46.7x47x19mm; receivertransmitter weight: 30g 12. Body material: ABS Packing list: Receiver x 1 User manual x 1 1 drag 3 charging cable x 1 3.5mmTRS audio cable x 1 3.5mm T