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1. Question: What is the power output of the Puxing portable walkie talkie PX-568D? Answer: The power output of the Puxing portable walkie talkie PX-568D is 5 watts. 2. Question: Does the Puxing PX-568D digital transceiver have waterproof capabilities? Answer: Yes, the Puxing PX-568D digital transceiver is ip67 waterproof. 3. Question: Are the Kydera GPS DMR Dual band digital walkie talkies equipped with GPS functionality? Answer: Yes, the Kydera GPS DMR Dual band digital walkie talkies are equipped with GPS functionality. 4. Question: What type of certification does the Puxing portable walkie talkie PX-568D have? Answer: The Puxing portable walkie talkie PX-568D has FCC and CE certifications. 5. Question: Is the Retevis RT90 a handheld or vehicle-mounted digital radio transceiver? Answer: The Retevis RT90 is a vehicle-mounted digital radio transceiver. 6. Question: What is the frequency range of the Retevis RT90 Amateur Digital Mobile Radio Transceiver? Answer: The frequency range of the Retevis RT90 is 136-174MHz/400-480Mhz. 7. Question: How many channels can the Retevis RT90 support? Answer: The Retevis RT90 can support up to 3000 channels. 8. Question: Do all the listed digital radio transceivers support dual-band functionality? Answer: Not all, but the Kydera GPS DMR Dual band digital walkie talkies and the Retevis RT90 support dual-band functionality. 9. Question: Can the Kydera GPS DMR Dual band digital walkie talkie be used as a ham radio? Answer: Yes, the Kydera GPS DMR Dual band digital walkie talkie can be used as a ham radio hf transceiver. 10. Question: How many zones can the Retevis RT90 handle? Answer: The Retevis RT90 can handle up to 250 zones.