Built-in software watchdog algorithm Built-in hardware anti-crash protection circuit Transmitting and receiving frequencies can be configured arbitrarily Multiple working modes optional Built-in hardware reset protection circuit Anti-overcurrent, overvoltage, reverse connection protection circuit Built-in anti-static protection circuit LoRa modulation mode Support wireless parameter modification Sensitivity: -132 dBm Working temperature range: -40-+85 Product application: switch remote control, security system, wireless remote access control, water pump wireless control Colour: Material:ABS + Metal Package Contents: 1 x remote wireless single-channel switch control module(Due to different factory batches, the product words are different, and the product accessories have slight differences in color and appearance, but it does not affect normal use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.