X6B 2.4G 6CH i-BUS PPM PWM Receiver for AFHDS SanDisk 64GB Micro SD-SDHC Memory Card What distinguishes the DM-81 is

What distinguishes the DM-81 is its combination of live AC voltage detection capability alongside traditional multimeter functions

MIFARE DESFire

meaning it can accurately capture signals up to approximately 100kHz (following Nyquist theorem requiring minimum 2x oversampling)

and AT command documentation

X6B 2.4G 6CH i-BUS PPM PWM Receiver for AFHDS SanDisk 64GB Micro SD-SDHC Memory Card What distinguishes the DM-81 isX6B 2. 4G 6CH i BUS PPM PWM Receiver for AFHDS The X6B 2. 4G 6CH i BUS PPM PWM Receiver is a high performance radio frequency receiver module designed for AFHDS (Automatic Frequency Hopping Digital System) compatible transmitters, delivering stable 6 channel control with dual protocol support. Professional drone pilots, RC aircraft enthusiasts, and industrial UAV operators rely on this receiver for its robust signal processing, interference immunity,