How can i huy just the microphones?

You can buy them from GTD Audio. Go to gtdaudio.net and search for 787

What kind of rechargeable batteries can you use in this unit, they can be used because I try Duracell but they are a little fat and someone broke one.

** DO NOT DO NOT ** Use rechargeable batteries in microphones (or any device) that uses standard batteries!! Standard batteries are 1.5volts. Rechargeable are 1.2 volts. So if you microphone uses two batteries, it is working with 3 volts. However, if you are using rechargeable batteries, you are only giving it 2.4 volts which means it may have reduced range and cause other problems, as 2.4 volts is like weak regular batteries. When someone like Shure provides a rechargeable battery pack option, the pack is actually containing THREE batteries in the pack - even though it fits into a two battery compartment thereby providing 3.6 volts for a 3 volt device. Again... you will have many problems if you try to use rechargeable batteries in a device like this!!

Does this system have echo cancellation built in? (to avoid ringing / resonance)?

It does not and these mics are fairly susceptible to feedback, however you can usually eq the rings out just fine or use the gain control on the receiver to decrease the sensitivity.

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GTDaudio 4x800 Adjustable Channels UHF Diversity Wireless Cordless Handheld Microphone Mic System Ideal for Church, Karaoke, Dj Party, Range 450ft (4 Handheld Mics)

GTDaudio 4x800 Adjustable Channels UHF Diversity Wireless Cordless Handheld Microphone Mic System Ideal for Church, Karaoke, Dj Party, Range 450ft (4 Handheld Mics)

Product ID: 92847119

Details

Brand
GTDaudio
Color
Black Silver
Compatible Devices
Headphone
Connectivity Technology
UHF
Connector Type
XLR
Included Components
microphone

📏450ft wireless range

📡True diversity for max range & reliability

📶800 selectable frequencies/channel

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$1131.35

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Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎤 Own the stage with flawless wireless freedom!

BUILT TO IMPRESS LAST - Durable metal build with omnidirectional mics designed for any professional setting
PRO GRADE SOUND CLARITY - 120dB signal-to-noise ratio delivers crystal-clear audio for every event
SEAMLESS MULTI MIC SYNC - 4 handheld mics with auto transmitter-receiver channel sync for zero hassle
UNMATCHED WIRELESS FREEDOM - 450ft UHF range keeps you moving without dropouts or limits
INTERFERENCE FREE PERFORMANCE - Automatic frequency scanning locks the clearest channel every time

The GTDaudio G-787 is a professional 4-channel UHF wireless microphone system featuring 800 selectable frequencies per channel, true diversity operation for enhanced range and reliability, and automatic frequency scanning for interference-free performance. With up to 450 feet of wireless range and easy transmitter-receiver synchronization, it’s ideal for churches, karaoke, DJs, and parties seeking crystal-clear sound and seamless multi-mic use.

Specifications

ASIN	B07KRMX7VH
Antenna Location	Karaoke, Singing
Audible Noise	120 Decibels
Audio Sensitivity	85 Decibels
Best Sellers Rank	#7,556 in Musical Instruments ( See Top 100 in Musical Instruments ) #130 in Handheld Wireless Microphones & Systems
Brand	GTDaudio
Built-In Media	microphone
Color	Black, Silver
Compatible Devices	Headphone
Connectivity Technology	UHF
Connector Type	XLR
Customer Reviews	4.4 4.4 out of 5 stars (486)
Enclosure Material	Metal
Frequency Response	590 MHz
Hardware Platform	Karaoke Machine
Item Dimensions	17 x 7 x 2 inches
Manufacturer	GTD Audio Inc
Mfr Part Number	G 787
Microphone Form Factor	microphone system
Model Name	G-787H
Model Number	G 787
Number of Channels	4
Polar Pattern	Omnidirectional
Power Source	Battery Powered
Signal-to-Noise Ratio	120 dB
Special Feature	Wireless
UPC	854318007356
Unit Count	1 Count

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