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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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

¥50060

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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Description

📢 Own the moment, amplify your presence!

DUAL POWER FLEXIBILITY - Rechargeable battery included with foldable prongs, plus optional 8 C batteries for extended outdoor use.
READY FOR ANY OUTDOOR EVENT - Perfect for sports, safety drills, camping, and more — with siren, detachable mic, and shoulder strap for hands-free control.
BUILT FOR PROFESSIONALS PROS - Trusted by first responders, police, and military agencies for reliable, high-impact communication.
VERSATILE PLAYBACK RECORDING - Record up to 16 seconds of audio and replay via USB, SD, or AUX for seamless messaging on the go.
COMMAND ATTENTION FROM 500 M AWAY - Unleash your voice with a powerful 50-watt amplifier and crystal-clear projection up to 1,600 feet.

The UZI-MP-PRO is a professional-grade 50-watt Bluetooth megaphone with a 500-meter range, adjustable volume, and 16-second recording/playback. Equipped with rechargeable and optional C battery power, USB/SD/AUX inputs, siren, and detachable mic, it’s designed for first responders, coaches, and outdoor enthusiasts seeking reliable, high-impact sound.

Specifications

ASIN	B07VDTZH9C
Best Sellers Rank	#27,975 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #11 in Coach & Referee Megaphones
Brand Name	Uzi
Color	Matte Black
Customer Reviews	4.4 4.4 out of 5 stars (551)
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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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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¥50060

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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