Features: High frequency transmission: ELRS 1W high frequency Head 915/868MHz TX Transmitter is equipped with powerful 1watt output power, which enables efficient signal transmission and communication. Multiple frequency band support: supports two commonly used frequency bands, 915MHz and 868MHz, with wide applications to meet the needs of different regions and equipment. Strong stability: with stable transmitting performances and wide signal coverage ensures the stability and consistency of data transmission. Electronic engineers: professional engaging in the field of wireless communication or Internet of Thing, technicians who need to carry out high-frequency data transmission. Long data transmission: for scenario that require high-frequency data transmission, such as remote controls models, data acquisition equipment Specifications: Item：ExpressLRS ELRS 1W RF Module High Frequency Head Size about 51x73x36mm/2x2.87x1.42in Receiver Size 122x123mm/4.8x4.84in Frequency: 915Mhz/868M Package Includes: 1Set ExpressLRS ELRS 1W TX Transmitter note: Due to problem of lighting effecs there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurement.