Product Specifications: The wireless transmitter (TX) operates on a frequency band of 2400 ~ 2483.5MHz and has a transmitting power of +10dBm. It features a PCB Antenna, Omnidirectional polar pattern, and frequency response of 80Hz ~ 20kHz. It comes with an external mic input interface (3.5mm TRS), a built-in li-ion battery (300mAh, 3.7V), and 5 hours of battery life. Weighing in at 29g with dimensions of 39 x 22 x 55mm, it can operate in temperatures between 0 ~ 50. The wireless receiver (RX) likewise operates on a frequency band of 2400 ~ 2483.5MHz and has a transmitting power of +10dBm. It has a PCB Antenna, audio output amplitude of +0dB ~ +12dB, audio output interface (3.5mm TRS), monitor interface (3.5mm TRS/TRRS), and a built-in li-ion battery (300mAh, 3.7V). It also endures 5 hours of battery life and has an operating temperature between 0 ~ 50. Key Features: This product operates with 2.4G digital wireless technology for universal frequency band worldwide. It has built-in and external MIC input options and supports mono/stereo and real-time monitoring. You can expect high fidelity sound quality, stable transmission with a distance of up to 50m, and a low audio delay. Please Note: Ensure face-to-face usage for optimal function. Avoid obstructions to the antenna for signal quality. Disable WIFI and Bluetooth on your phone to prevent interference. Do not drop, hit or bump the device. Keep it away from heat sources or interference. Use microphone windproof hair when outdoors to reduce wind noise. Avoid wet or humid use and storage conditions. Packing List Includes: 1 Transmitter, 1 Receiver, 1 Reset Pin, 1 User Manual, 1 Wind Muff, 1 USB A-USB C Charging Cable, 1 3.5mm Mic Audio Input Cable, 1 3.5mm TRS-TRRS Audio Cable, 2 3.5mm TRS-TRS Audio Output Cables Product Images: