Features: 433M digital transceiver: CC1101 wireless module supports 433MHz digital transceiver. stable signal transmission. suitable for long distance data transmission needs. Equipped with SMA+ glue stick antenna to improve signal reception strength and transmission distance. Highly performances CC1101 chip: Equipped with highly performances CC1101 chip. it has stable communication performances and low power consumption. Fast Data Transmission: Supports fast data transmission and excellent anti-interference ability in wireless communication. Easy to install: Simple and easy to use design. with SMA interface. it is convenient for users to set up the communication environment quickly. Specifications: Model: CC1101 Wireless Module Size:about 15x28mm/0.59x1.1in Frequency：433M Package Includes: 1Set CC1101 Wireless Module note: Due to problemsof lighting effect and shooting there mightbe certain tolerances in product. please understand. Please allow 0-1cm error due to manuals measurement