can i plug my iphone into it and use it as a speaker?

Yes, there is a AUX input jack.

I can’t figure out what the trigger does. As soon as I turn it on it stays on. Anybody have info for me?

The trigger is there in case you don't want to have the megaphone on at all times. You can press the trigger to activate the microphone only, all the other functions will not work while pressing the trigger.

Is it loud enough to interrupt a concert?

I’m unsure if it would interrupt a concert, but it’s loud enough to be heard across a heavy traffic intersection

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Uzi High Power Loud Big Bluetooth Megaphone 50W, Professional Bullhorn Megaphone Used by First Responders, Police & Agencies, Rechargeable Battery, PA System, Outdoor Activitie

Product ID: 164641062

📡500m Broadcast Range

🔊50W Power Amplifier

🔋Rechargeable Battery + 8 C Battery Option

¥49533

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📢 Own the Moment, Be Heard Beyond Limits!

VERSATILE POWER OPTIONS - Rechargeable battery included for eco-friendly use, or switch to 8 C batteries for extended sessions—flexibility that fits your mission.
MULTI SOURCE AUDIO PLAYBACK - Seamlessly connect via USB, SD Card, or AUX jack to amplify your custom audio or siren sounds with professional clarity.
RECORD REPLAY YOUR MESSAGE - 16-second internal memory lets you record critical announcements and replay them on demand—perfect for dynamic environments.
COMMAND ATTENTION FROM 500 METERS - Unleash your voice with a powerful 50W amplifier and a broadcast range that dominates outdoor spaces.
BUILT FOR PROFESSIONALS TRUSTED BY ELITE - Used by first responders, military, and agencies, this megaphone combines rugged design with a 1-year warranty for peace of mind.

The UZI-MP-PRO is a professional-grade 50W megaphone featuring a 500-meter range, adjustable volume, and 16-second recording/playback. It supports rechargeable and standard C batteries, includes USB/SD/AUX inputs, and is trusted by first responders and military agencies. Designed for outdoor events and emergency use, it offers durability and versatility backed by a 1-year warranty.

Specifications

ASIN	B07VDTZH9C
Best Sellers Rank	#20,122 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #11 in Coach & Referee Megaphones
Brand Name	Uzi
Color	Matte Black
Customer Reviews	4.3 4.3 out of 5 stars (553)
Date First Available	July 19, 2019
Included Components	Rechargeable Battery
Item Package Dimensions L x W x H	14 x 10 x 9 inches
Manufacturer	Uzi
Material	Plastic
Model Name	UZI-MP-PRO
Package Weight	1.43 kg
Part Number	UZI-MP-PRO
Style	Megaphone
Suggested Users	unisex-adult
Warranty Description	1-Year Warranty

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