innopow WM333 Dual UHF Wireless Microphone System

The innopow WM333 is a dual-handheld UHF wireless microphone system for karaoke, singing and amplified events. Its receiver is listed with two individual XLR outputs and one mixed 1/4-inch output, while the advertised battery life and operating range are manufacturer claims rather than guaranteed results.

At a glance

Two handheld microphones are listed, with automatic frequency scanning and manual channel selection described for setup.
The receiver is claimed to have two individual XLR outputs and one mixed 1/4-inch output for connecting to audio equipment.
The claimed line-of-sight working range is 180-240 Ft (60-80m), and battery life is listed as 14-17 hours.

Price

$134.09Save 10%

Reference price: ~~$148.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

Two handheld microphones and multiple receiver output options are listed, supporting dual-mic use with compatible amplification or mixing equipment.
Automatic scanning and manual frequency selection give users two stated ways to choose operating frequencies.
The manufacturer lists a metal microphone kit and a unidirectional pickup pattern.

Technical specifications

18 specifications

Identity
Brand	innopow
Model	WM333

Wireless system and outputs
Wireless connection listed	XLR
Frequency range	533-588 MHz
Selectable frequencies	100 Selectable frequencies on each channel, Battery Life: 14-17 Hours
Listed channel count	1
Outputs	Extra Two XLR individual outputs, and one 1/4 Mixed output.
Polar pattern	Unidirectional
Microphone form factor	Handheld
Signal-to-noise ratio	120 db

Power and battery
Power configuration	Battery Powered
Battery requirement	4 AA batteries required.
Advertised battery life	14-17 Hours

Range
Advertised working range	180-240 Ft (60-80m) line-of-sight

Compatibility and construction
Compatible devices	Amplifier, Audio Mixer
Enclosure material	Metal

Dimensions and installation
Dimensions listed	17.7 x 3.1 x 12 inches
Weight listed	3 pounds

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title claims 200 channels and 16 hours of use, while details say 100 selectable frequencies on each channel and 14-17 hours. The feature text gives microphone frequency bands of 536.57-561.32 and 562.37-587.12, while the general frequency range is 533-588 MHz. The listed channel count is 1 despite the dual-mic description. Check the exact configuration and local frequency suitability before buying. The stated range is for a wide-open, line-of-sight area, and a power amplifier is recommended by the listing for a good effect.

What’s in the box

Included

Wireless receiver
2 handheld microphones
2 antennas
Power adapter
1/4-inch audio cable

Who is it for?

A good fit for

Karaoke singers or small events needing two handheld microphones and a receiver with XLR and 1/4-inch output options.
Buyers who want automatic frequency scanning as well as manual frequency selection for multi-system setup.

Less suited to

Buyers who need a firmly confirmed channel count, precise battery-life figure or operating-frequency configuration before purchase.
Setups without compatible audio equipment, since the listed system is intended to connect to an amplifier or audio mixer.

innopow WM333 Dual UHF Wireless Microphone System · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 1,722 ratings

5 stars71%71%
4 stars16%16%
3 stars7%7%
2 stars3%3%
1 star3%3%

Customer feedback highlights reported good sound, range, build and value, but experiences with reliability, durability and noise are mixed. Some customers report channel or receiver failures and interference, while others say background noise is not picked up. That variation matters for an event setup where dependable operation is important. The listing's selectable frequencies and claimed line-of-sight range provide setup context, but do not establish performance or resolve those customer concerns.