what type of battery it is? aaa or aa?

It has a replaceable Watch battery

Byrna Banshee Personal Safety Alarm - 130 dB Loud Military Grade Self Defense Emergency Keychain Siren Device with LED Strobe Alert Light for Women, Men, Children, Elderly, Hikers and Runners (Black)

Byrna Banshee Personal Safety Alarm - 130 dB Loud Military Grade Self Defense Emergency Keychain Siren Device with LED Strobe Alert Light for Women, Men, Children, Elderly, Hikers and Runners (Black)

Product ID: 377547947

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Details

Battery description
Lithium
Brand
Byrna
Colour
Black
Number of batteries
2 CR2032
Power source
Battery

🔊130dB ear-piercing alert

🔋1-year replaceable lithium batteries

🛡️Durable, water-resistant design

Description

🛡️ Stay loud, stay safe, stay unstoppable.

JET LEVEL LOUDNESS - 130dB siren cuts through noise like a military jet at 50ft—impossible to ignore.
LONG LASTING POWER - Replaceable lithium batteries keep you covered for up to a year—no frequent charging hassles.
ALWAYS WITHIN REACH - Compact keychain design with included carabiner clips seamlessly to bags, belts, or straps for instant access.
UNIVERSAL SAFETY COMPANION - Perfect for women, men, kids, seniors, hikers, and runners who refuse to compromise on personal security.
BUILT TO BRAVE THE ELEMENTS - Water-resistant and rugged, ready to protect you rain or shine.

The Byrna Banshee is a military-grade personal safety alarm delivering a powerful 130dB alert—comparable to a jet engine at 50 feet—to deter threats and summon help instantly. Compact and lightweight, it attaches easily to your gear with a carabiner, is water-resistant for all-weather reliability, and powered by replaceable lithium batteries lasting up to one year. Designed for everyone from students to outdoor enthusiasts, it’s your essential, always-ready personal security device.

Specifications

ASIN	B09GBQFCZS
ASIN	B09GBQFCZS
Audible Noise	130 Decibels
Batteries	2 CR2032 batteries required. (included)
Battery Description	Lithium
Best Sellers Rank	#63,596 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #75 in Security Horns & Sirens
Brand	Byrna
Built-In Media	Batteries
Color	Black
Control Method	Touch
Customer Reviews	4.3 4.3 out of 5 stars (217)
Customer reviews	4.3 4.3 out of 5 stars (217)
Date First Available	4 October 2021
Item Weight	0.03 Kilograms
Item model number	BM68450
Manufacturer	Byrna
Manufacturer	Byrna
Maximum Range	50 Feet
Number of Batteries	2 CR2032 batteries required. (included)
Power Source	Battery Powered
Product Dimensions	10.16 x 3.81 x 2.54 cm; 32 g
Sensor Technology	Contact Sensor
UPC	810042111172
Unit Count	1 Count
Voltage	3 Volts (DC)

Reviews

L**Y

Fantastic! Very loud. Bought it for my daughter and tested it to see how far away I could hear it. Even from inside my house, I heard it on the other side of my neighbors house. She clips it to her belt loop so it's always there if she needs it.

7.03.2026

T**M

Not working the way the advertisement said it would. Very disappointed.

27.08.2022

M**X

This work very well for self defense.

9.12.2025

A**R

Very annoying sound, guess it must work.

19.09.2025

E**U

Makes a loud noise has a bright light. I hope it's going to work well I've never had to use it before.

24.09.2025

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