Quatech SS-BLT-300. Connectivity technology: Wireless, Host interface: RS-485, Interface: Bluetooth. Data transfer rate (max): 0.1152 Mbit/s. Bluetooth version: 2.0+EDR, Frequency band: 2.400 - 2.4835 GHz, Maximum operating distance: 100 m. Power consumption: 200 mA. Width: 90 mm, Depth: 70 mm, Height: 30 mm