Weight 300g, Battery type Lithium battery, Frequency 400-470MHz, Channels 16, Color Black, Communication distance 1-3km, Operating voltage 3.7V, Output power 5W, Brand BAOFENG.
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Aliexpress
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Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($45.73): BG2589f4
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGCuponation10, 13f142, BGHONEY2110, BGd0b05d
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for BAOFENG BF-T18 Walkie Talkie. The lowest price was: $35.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).