Which frequency is work best in san jose , California?

G50 is capable of 27 simultaneous channels and H50, V50 and J50A ate capable of 14 maximum channels each. X52 is capable of 12 Max. So any of them can be used. But it depends on how many simultaneous devices you want to run.

Is this just the SM58 wireless microphone? Or is it the microphone and receiver combo?

This product is an SM58 microphone with a built-in wireless transmitter - it does not include a wireless receiver, which is required in order to use this microphone. Please note the frequency band of the product is V50 - It important that all components in your wireless system have a matching frequency band. Please visit the Wireless Frequency Finder tool on the official Shure website for find the frequency bands that are best for your area.

ASIN	B00MG1H7X4
Batteries	2 AA batteries required. (included)
Battery type	Alkaline
Best Sellers Rank	#11,648 in Musical Instruments ( See Top 100 in Musical Instruments ) #153 in Handheld Wireless Microphones & Systems
Color Name	Transparent
Customer Reviews	4.5 4.5 out of 5 stars (67)
Date First Available	February 1, 2015
Global Trade Identification Number	00042406344852
Hardware Platform	Karaoke Machine, Speaker
Is Discontinued By Manufacturer	No
Item Weight	1.5 pounds
Item dimensions L x W x H	12.7 x 4.7 x 3.3 inches
Item model number	QLXD2/SM58=-G50
Manufacturer	Shure
Material	Metal
Material Type	Metal
Microphone Form Factor	microphone only
Number of Batteries	2 AA batteries required. (included)
Number of Channels	1
Power Source	Battery Powered
Product Dimensions	12.7 x 4.7 x 3.3 inches
Signal-to-Noise Ratio	78 dB
Size	197.15 cubic inches
Standing screen display size	2
UPC	042406344852

Shure QLXD2 Handheld Transmitter with SM58 Vocal Mic Capsule for QLX-D Digital Wireless Systems, Receiver Sold Separately, G50 Band

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