The COK ST1100 wireless microphone is a microphone product line that can be used for portable speakers with 2 accompanying duet microphones, simple and fast wireless connection, large capacity rechargeable battery ensures durable operation, sing freely without having to charge too many times. Outstanding advantages of COK ST1100 Wireless Karaoke Microphone Sturdy, meticulous design, integrated with modern functions Extremely high quality sound processing system with new generation sound filter, COK ST1100 Wireless Karaoke Microphone has the ability to process sound extremely well, responding to sound frequencies from 50Hz to 18KHz, extremely high level processing, extremely attractive, noise reduction Completely wireless connection, with a distance of 2 mics from the receiver is 80m Microphone uses UHF band (ultra high wave) to avoid overlapping or interference High capacity rechargeable battery, durable operation without needing to be charged many times Supports convenient stand for 2 microphones Compatible with a variety of different speaker lines, typically very good for portable speakers, microphones for announcements. The COK ST1100 Multi-function Wireless Karaoke Microphone is very convenient, easy to connect to an Amplifier or a Portable Speaker with just one simple operation: plug the mini frequency transmitter into the 6.5 jack of the Portable Speaker or Amplifier and it can be used immediately. The COK ST1100 Microphone body is made of high-quality cast aluminum alloy, helping to hold firmly and firmly in the hand, combined with a high-quality wireless Microphone core integrated with new technology to provide optimal recording quality, eliminate noise and interference, bringing a clearer and more realistic singing voice. COK ST1100 Multi-function Wireless Karaoke Microphone is manufactured by COK, COK is also the leading brand in the field of manufacturing Multi-function Wireless Microphones. Technical specifications of Using wave frequency: UHF band Digital audio transmission technology Anti-interference technology even when using the same gear Extremely short audio delay Automatically scans frequencies when using 32-bit encoder 120MHz wide bandwidth 100Ch channel RF output power 10mW Capacity of 1 battery: 18650 Lithium 3.7V Receiver: Frequency range 630 - 690MHz Receiver bandwidth 60MHz Receive sensitivity -95dBm AA battery 1.5V FULL SET OF COK ST1100 WIRELESS KARAOKE MICROPHONE PRODUCTS: ANTI-HOWING, SOUND FILTERING: Used to beam onto the Microphone head to help prevent howling and filter noise very well. FREQUENCY TRANSMITTER: Plug the transmitter into the 6.5 jack of the Amplifier or Portable Speaker to use. 3.5 CONVERTER JACK: Used for speaker models without a 6.5 jack, attach the converter jack to the transmitter to convert to 3.5 ANTI-ROLLING SET: Attach to the microphone body to help prevent rolling and impact. CHARGING CABLE: Charge the frequency transmitter by plugging it into the back of the transmitter. 2A BATTERY: Comes with 2 pairs of 2A batteries for use with wireless microphones