Earldom Wireless Lavalier Microphone for Lightning iPhone

Lightning (iPhone) Frequency Range: 2.4GHz Microphone Type: Condenser Polar Pattern: Omnidirectional Sensitivity: -38dB +/- 3dB Frequency Response: 50Hz-16kHz Signal-to-Noise Ratio: > 70dB Battery Capacity: 50mAh Battery Life: Up to 5 hours Charging Time: 2 hours Transmission Distance: Up to 25 meters Operating Temperature: 0°C to 40°C Dimensions: 25mm x 15mm x 11mm Weight: 10g