The DL-LR45B433M is an RF module manufactured by DreamLNK. It is ROHS compliant and features 434MHz frequency, with a high-sensitivity, low-current design. It also includes adjustable parameters for data rate, packet length, add-on length, wake-up interval, and encryption. The module has an integrated matching network, a single-ended antenna, data interface and a built-in 20MHz crystal oscillator, with a power supply range of 1.8V to 3.6V. It can send packets up to 200m in an open area, and has a maximum data rate of 500 Kbps. It also features advanced data forwarding and packet filtering capabilities.