Features:Wireless handheld microphone suit - Suitable for family KTV singing, parties, speeches, business meetings, etc. High-quality microphone and high-quality filter system to solve the problem of howling. Strong anti-interference ability for stable signal with receiving distance range of 30-100 meters. Strong pickup and clear sound, no noise with constant frequency. Thick metal mesh cover, anti-fall and anti-deformation, with built-in high-efficiency filter cotton to effectively filter wind noise. Plug and play, easy to use. Automatic connection and widely compatible with audio, amplifier, multimedia, mobile audio and other products. A wide range of device support applications, as long as the device with the microphone interface can be connected. Specification:Type: Wireless Handheld MicrophoneModel: E7Silent control: lock noiseFrequency offset: 11kHzFrequency response: 50Hz-18kHzFrequency stability: 0.005%Signal to noise ratio: >90dBDistortion: 0.5% (1kHz)Number of channels: 2 channelsSensitivity: -70dB MUse distance: 50 meters in the open areaReceiver power supply: DC 12V/320mATransmitter power supply: AA battery (NOTIncluded)Transmit power: 20mWFrequency range: 200MHz-300MHzOutput mode: independent and hybridautomatic selectingTransmitter:Frequency stability: 0.005%Carrier output power: 30mWSpurious emission suppression: >40dBModulation method: VHFMaximum modulation: 75KHzPickup mode: (capacitive) (LWM-6188/C)Receiver:Receive sensitivity: <2VImage rejection: >40dBAudio output impedance: 600Audio output level: 0-0.5VUse power: AC220-240V 50/60HzPower consumption: 1WPackage list:1 x 3.5MM Antenna1 x Converter2 x Microphones1 x Receiver1 x Charging Cable1 x Instruction ManualNote:1. Please note that microphones shipped without batteries, but receivers shipped with batteries.2. Please allow slight error due to manual measurement. Thanks for your kind understanding.3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..4. The 3.5 audio line is a wired antenna, and the distance when the antenna is connected will be longer and more stable.5.The product can only be inserted into the microphone interface (MIC), and the AUX interface cannot be used.