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100pcs SA818 (SA818-U) New generation walkie talkie module with UHF 400 ~ 480 MHz audio module RDA1846S chip - AliExpress
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SA818 Wireless Walkie Talkie Module UHF 400-480 MHz Audio Module Sale - Banggood USA Mobile-arrival notice
UHF 1W SHARI SA818 Ham Allstar Radio Interface Compatible Raspberry Pi hotspot | eBay
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Amazon.com: AURSINC SHARI PiHat - Portable SA818 Ham Allstar Radio Interface Compatible with Raspberry Pi 2/3/4 | Raspberry Pi Hosted Allstar Node | UHF Frequency Range 1W 420-450MHz/70cm | Amateur Radio Operator : Electronics