Product Characteristics： 【Universal and Performance Wireless System & Portable and Durable】The Receiver Powered by Phones, the Transmission Microphone Built in Rechargeable Batteries Up to 6 hours Operation Time.   【Plug and Play, NO APP or BLUETOOTH is needed 】Easy to use, switch on and plug in the receiver to connect automatically Lapel Microphone is different from others.  Ours includes transmitter and receiver (with work range up to 20M) they will automatically connect, so APP or Bluetooth are not required .   【PORTABLITY AND DURABLITY 】Small Compact Size Help Easily Clip to Your shirt, Tie or Pocket.  Hands-Free Experience, Perfect for Filers, Vloggers, Youtubers, Mobile Journalists, Content Creators, etc.   【Real-time Clear Voice Auto-Sync Technology】Built-in Omnidirectional Condenser Microphone, it Captures Sound in Every Direction. Using real-time auto-sync technology, which extremely reduce the video post-editing.20M/65FT Working Distance without obstacle, 360°omnidirectional sound reception, recording every detail.  Small Compact Size Help Easily Clip to Your shirt, Tie or Pocket. Hands-Free, Perfect for Filers, Vloggers, Mobile Journalists, Content Creators, etc.   【Noise Reduction】Omnidirectional microphone for iPhone,clear recording in noisy environment.  Built-in high-sensitivity sound capture accessories and maximum support 20 khz high-frequency.