IP67 protection level: waterproof, dustproof, acid-proof and corrosion-resistant, ensuring durability in various harsh environments Energy-saving mode: two AA batteries can be used for up to 100 days, economical and Long-lasting use Full voltage design: supports DC12-24V and AC36-440, with more flexible voltage selection to meet various usage needs Strong anti-interference ability: The new T3 solution provides strong anti-interference ability and works stably within a range of 100 meters (up to 1000 meters in high power mode) E-card pairing design: If the transmitter is lost or damaged, just use the "E-card" to copy it to the new transmitter for successful pairing, which is easy to operate