How To Change The Frequencies for each Mic on the Rockville RWM-ICE Dual UHF Handheld Wireless Mic

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What's in the Box:

Metal mic receiver with LCD display (1/2 rack size)
(2) handheld microphones with LCD display with faux diamonds
(2) antennas
(4) AA Batteries
6-Foot ¼” to ¼” audio cable
5-Foot power adapter
Metal travel case
Owner’s manual and warranty card
Features:

Rockville RWM-ICE Dual UHF 100 Chan. Diamond Handheld Wireless Microphone System
Includes (2) metal handheld microphones with faux diamonds and LCD display
100 adjustable unique frequencies on each microphone ensures interference-free operation
IR sync way to switch frequencies with the touch of a button on the receiver
½ rack unit metal receiver with LCD display
Illuminated rotary knobs
The display on the microphone shows frequency and battery life
The display on the receiver shows RF signal strength, AF signal strength, and the frequency channel of each handheld mic
Operating range: 300´ – 400´(indoor) and 250´ – 350´(outdoor)
Each mic uses different channel groups to prevent interference from one microphone to the other (There are 200 total different channels on this system – A mic and B mic can be used interchangeably)
Ergonomic microphones are extremely high quality with a beautiful diamond cover, and they have a pleasant weight and feel
Individual XLR outputs for each microphone to send each microphone to its own mixer channel
¼” mix output to send both mics to one mixer channel
Mute function
On/Off switch on each microphone
Low power consumption for extended battery life
Individual microphone volume control
Cardioid pick-up pattern
Type: Handheld dynamic
Features a dual filter design to limit feedback and interference
Frequency range: 500MHz-599MHz
Rubber feet for tabletop use
Includes an aluminum hard-shell case with molded EPE foam and soft cushion eggshell foam
Case has a handle and high-quality latches
Case can accommodate 2 mics, a receiver, antennas, a cable, adapter clip, and 2 cables
Specifications:

MCU working voltage: 2.8V-3.6V
Frequency Stability: ±0.005%
Modulation Mode: UHF
Frequency Response: 50Hz-20KHz (±3 dB)
Dynamic Range: 96dB
S/N: 92dB
T.H.D: < 0.1%(1KHz)
Delay: <3.0ms
Transmitter power: 11mW
Receiver sensitivity: -94dB
Audio Output Jack: XLR balanced & 1/4" unbalanced
Power Voltage: AC110V-240V 50/60Hz
Operating Temperature: 14°F-122°F
Mic Battery Operating Time: up to 10 hours