vLinker BM is a Bluetooth product that turns your Android device or Windows PC into a professional-grade diagnostic scan tool (iPhone devices are not supported). Unlike other OBD adapters, vLinker BM will not drain your battery if you leave it plugged in. The operating current is 51 mA, automatic sleep in idle state, the sleep current is as low as 3mA. KEY FEATURES: USART data buffer up to 2K bytes, baud rate increased to 230.4Kbps. Faster, more reliable, and more feature-rich than its predecessors. OBD request byte up to 1024 bytes, can meet the needs of some special long frame communication. TP transmission protocol, ensures wireless communication security. BatterySaver technology - innovative sleep function lets you leave it plugged in without risk of draining your car's battery. Superior compatibility - works with more 3rd party apps and software than any other adapter. Supports battery voltage drop, active OBD bus, etc. Up to 3 ways to wake up from sleep mode. Over-voltage, over-current, over-temperature, and battery drain protection, firmware updates Fully compatible with ELM's AT command set (ELM327, ELM329); Upgraded version of iCar pro, especially for coding APP that requires a large amount of data transmission vLinker BM is a diagnostic scan tool, trip computer, logger, and real-time performance monitor. This pocket-sized adapter won't obstruct driver legroom and features unparalleled performance, intelligent sleep mode, exceptional third-party app support, and free lifetime firmware and software updates.