Summary 【UHF Wireless Microphone System in 328ft Transmission】Comes with ID Pilot Frequency Lock Technology, Wireless Microphones and Receiver Provide Stable Signal, Anti-howling and Anti-interference. 200 Sets Frequency Adjustment and Dual Antennae Allow you Enjoy Music World in an Extended Transmission Range of 165-328ft. An Excellent Choice for Church, Wedding, Family Parties, Small DJ Stages, Conference, Karaoke, and etc. 【Premium Infrared Pairing with LED Display】Please SET the Frequency up and down on the Receiver at first. Then Long Press SET, Short Press SET, and Align the Infrared Frequency Point of the Microphone with the IR Point of the Receiver. After Pairing is Complete, the Screen will Display the Microphone Signal and Microphone Volume. You will be Surprised by the High Quality Music without Interference. 【Sturdy Metal Design for Microphones and Receiver】Metal Brushed Aluminum Alloy, Makes a Firmer and more Stable Structure and Ensures Stable Product Performance. Simple and Compact Design but Comfortable and Full of Fashion. 【Excellent Sound Quality without Noise】Built-in Durable Metal Mesh Head and High-density Filter Sponged Enjoy you an Impressive Audio Experience without Noise. With High-quality Suppression Technology, Wireless Microphones Automatically Remove Low-frequency Noise, and Restore the Sound by Identifying High and Low Frequency Noise Signals. 【Safe and Convenient to Use】You will get Receiver, 2 Hand-held Wireless Microphones, 2 Antennae, RCA Cable, 6.35mm Audio Cable, 6.35mm to 3.5mm adapter, Power Adapter, 4 AA Size Batteries for Testing, User Manual, 2 Microphone Sponges , 2 Microphone Anti-Rolling Rings and Certified Power Supply. LiNKFOR UHF Wireless Microphone System Infrared Pairing 2 Handheld Metal Wireless Microphones and Metal Receiver 200 Channels 328ft Transmission LCD Description Specification： Comprehensive features Frequency band: U band Modulation mode: FM adjustable frequency Max frequency offset: 45KHz Frequency response: 50Hz-15KHz S/N Ratio: >105dB(A) Distortion(1KHz): Working temperature: -10 C~55 C Working range: 165~328FT (Open Area) Microphone RF Power output: 10mW Oscillation mode: PLL(Digital frequency synthesizer) Frequency stability: Dynamic range: 100dB(A) Frequency response: 50Hz-15KHz Max input pressure: 130dB SPL Microphone pickup: Moving coil Power supply: 2 (1.5V) Battery Receiver Oscillation mode: PLL(Digital frequency synthesizer) Stray reject: 80dB Image reject: 80dB Sensitivity: 5dBu Audio output level: XLR Output Jack:800mV, 1/4 " Output Jack:800mV Working voltage: DC 12V Working current: Note: 1. The AA batteries in the package are just for testing the mics, it can only last for 1 to 2 hours, so after testing, please replace new batteries for better using experience. 2. The unit only contains wireless microphone system, you need extra equipment to output the sound. 3. Check if your soundbar or speaker has AUX or MIC interface. Otherwise cannot connect. The volume of the AUX interface will be lower than that of the MIC interface, which is normal. 4. If there is noise or electric current, please reconnect to make sure the installation is correct and the plug connection is tight. 5. Please install the microphone battery correctly, please pay attention to the "+-" direction of the battery. Package includes: 1 x Receiver 2 x Wireless Microphones 2 x Antenna 1 x 6.35mm Audio Cable 1 x 6.35mm to 3.5mm adapter 1 x Power Adapter 4 x "AA" size battery 1 x User Manual 2 x Microphone Sponge 2 x Microphone Anti-Rolling Ring