Product description vLinker BM is a Bluetooth product , Transform your Android device, or Windows PC into a professional-grade diagnostic scan tool(iPhone devices are not supported). Unlike other OBD adapters, vLinker BM won't drain your battery if you leave it plugged in. Operating Current is 51 mA, automatic sleep in idle state, sleep current is as low as 3mA. KEY FEATURES: USART data buffer up to 2K bytes, baudrate 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 , Ensure wireless communication security. BatterySaver technology - innovative sleep function lets you leave it plugged in without danger of draining your car's battery. Superior compatibility - works with more 3rd party apps u0026 software than any other adapter. Supports battery voltage drop, OBD bus active, 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, specifically for coding APP that requires large amount of data transmission vLinker BM is a diagnostic scan tool, trip computer, logger, and real-time performance monitor. This pocket-size 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.