Features: Ubertooth One can be used for Bluetooth-compatible signal monitoring, as well as the development and testing of new Bluetooth-compatible and wireless technologies. 2.4 GHz Transmit and Receive. Transmit power and receive sensitivity comparable to a Class 1 Bluetooth-compatible device. In-System Programming (ISP) Serial Connector. Expansion connector intended for inter-Ubertooth communication or other future uses. The Ubertooth One is an open source 2.4 GHz wireless development platform suitable for Bluetooth-compatible experimentation. One thing that sets the Ubertooth apart from other Bluetooth-compatible development platforms is that it’s capable of not only sending and receiving 2.4 GHz signals, but can also operate in monitor mode, monitoring Bluetooth-compatible traffic in real-time. This operating mode has been present in low-cost WiFi modules for years and has found uses in research, development and security auditing but no such solution existed for the Bluetooth-compatible standard until now. Also, because it’s a fully open-source platform (software and hardware), the schematics and code are readily available for all of your needs. Specifications: Material:PCB Size: Approx.6.17x1.9cm/2.42x0.74inch Color:Black for Ubertooth One Transmission rate: 5 (Mbps) Effective working radius: 5 (for m) Bluetooth-compatible Standard: 2.0 Package Includes: 1x Sniffer note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.