LR43B/LR33B 433MHz/315MHz ASK Superheterodyne RF Module Wireless Specifications: Operating frequency: 315/433MHzSensitivity: -110dBmRF Chip: LR680RModulation method: ASK amplitude modulationOperating Current:2mA/2.5mAOperating voltage: 2~5.5V Working temperature: -40~80 Package Included: 1 x LR43B/LR33B 433MHz/315MHz ASK Superheterodyne RF