Quatech SS-BLT-400PR. Connectivity technology: Wireless, Host interface: RS-232, 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. Width: 90 mm, Depth: 70 mm, Height: 30 mm. Operating temperature range (T-T): 0 - 70 °C, Storage temperature range (T-T): -20 - 80 °C