Product model: DL-LL02 RF frequency: 433MHz Working voltage: 3.3V Working mode: peer-to-peer transparent transmission, one-to-many, and many-to-many network communication Communication distance: 5000 meters (outdoor open and unobstructed, 5dbi antenna, 15 meters above the ground) Interface type: dual serial port (command/pure dual serial port) Configuration method: button configuration, command configuration Colour:As Shown Material:PCB Package Contents: 2 x SX1278 433M lora wireless module kit 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.