CTCSS/DCS Frequency Deviation(W/N) 0.7±0.1KHz/0.4±0.1KHz, Spurious Radiation ≤7.5μW, Intermodulation 60dB, Frequency Stability ±2.5ppm, Antenna Impedance 50Ω, Modulation W/N 16kΦF3E / 11kΦF3E, Item Radio Walkie Talkie, Channel Spacing 25/12.5KHz, Audio Power ≤0.5W, Frequency Range UHF: 400~480MHz, Signal Noise Ratio 43/38dB, Weight(with antenna and battery) 315g, Battery 1300mAh (Polymer Li-ion), Size 97 X 57 X 30mm, Rated Audio Power Output ≤0.5W, Working Manner Same frequency simplex or different frequency simpiex, Audio Distortion ≤5%, Operating Voltage 3.6V, Spurious Rejection 70dB, Sensitivity ≤0.25/0.28μV, Intermodulation Selectivity 70/50dB, Channel Capacity 16, Maximum Frequency Deviation ≤5KHz (Wide), Output ≤5W, Temperature -25℃~+65℃, Brand Quansheng.
Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Aliexpress
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Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I couldn’t find any coupon for this product on latest product update.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): Tabby20, 2203ActiesNL, BG1efeb0, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BGcoupon8off, BGGutscheine, BG00c906, BG8OFFCOUPON, BG589b2e
(these coupons are old, so probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for QUANSHENG TM-800 Walkie Talkie. The lowest price was: $14.59.
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)).