Product model: DL-LL02 RF frequency: 433MHz Working mode: point-to-point transparent transmission, one-to-many, many-to-one, and many-to-many networking communication distance: 5000 meters (outdoor open space without barriers, 5dbi antenna, 1.5 meters above the ground) Interface type: dual serial port (command/pure dual serial port) Configuration method: button configuration, command configuration Working voltage: 3.3V Color: 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.