Features: - UHF 2×100 Channel Receiver - Digital Signal Processor - High-fidelity Cartridge Module - Infrared Carrier-frequency Synchronization - Unique ID Address - Super Anti-Jamming Circuit Design - Super-low Background Noise - Frequency Auto-Search (Search Non-Interference Frequency) - Microphones Can be Use with Any Receiver - Microphone High-Low Two Type Power Transmitter - Scope of Application: Conference, High-Class KTV, Stage - Provide with Perfect Switch Noise Deducted Circuit - Includes (2) Handheld Mics - Portable Rechargeable Battery Microphones - Simple Plug-and-Play Operation - Perfect for Professional Audio Stage & Studio Performances - Directly Connects to Amplifiers, Stereos, Audio Processors, DJ Mixers - Used for Home Karaoke, Classroom, Office & Business Applications What's in the Box: - Receiver - (2) Handheld Microphone - Power Adapter (DC 12V,1A) - Connecting Line (39.37'' -inches) - (4) Rechargeable Batteries (NI-MH Battery) - (2) Silicone Antiskid - (2) Antenna Transmitter Specs: - Transmitter Power: 3-8mW - Modulation Method: FM - Sampling Ratio: 48KHz - Delay Time of Audio Transmission: Receiver Specs: - Power Supply: AC100~240V/ 50/60Hz, DC12v - Power Consumption: 200mW - S/N Ratio: >96 dB, - Frequency Response: 30 ~ 20 KHz - RX Sensitivity: Technical Specs: - Frequency Range: UHF 510-560MHz - Channel: 2 x 100 - Frequency Stabilization: 90dB - Total Harmonic Distortion: