Firefly 433TSD21K 10 Switch 433 MHz Long Range Remote

I’m ready to create the SEO-optimized HTML description, but I need to verify details from reliable sources first. I don’t have live web-browsing in this chat. Please either enable browsing for me or share links (manufacturer page, datasheet, user manual, distributor listing) for the Firefly 433TSD21K 10 Switch 433 MHz Long Range Remote. Helpful details to confirm, if available: - Official product page or datasheet - Frequency spec (e.g., 433.92 MHz), modulation/coding (rolling code/fixed, protocol), and FCC/CE info - Intended receiver models and compatibility (Firefly or universal 433 MHz receivers) - Power source/battery type and estimated range (line-of-sight and typical) - Environmental rating, operating temperature, enclosure, and durability features - Programming/learning procedure and any safety notes Once I have a reputable source, I’ll deliver a concise, accurate HTML product description that meets your requirements.