Pearl 4-button transmitter radio frequency: 922.5MHz 

MSRP $41

• 4-channel output
• Repeating function: press and hold desired button 1-3 sec.
• Battery: CR2032 3V lithium
• Visor clip included
• Keyring included
• Transmitter code: TX55-9225-4
• Energy consumption: >10 mW
• Temperature range: -13˚F to 149˚F
• Range: up to 460' depending on surroundings