Bluetooth Mini Box ELM327 OBD2 Scanner With Power Switch

Every Bluetooth OBD2 dongle eventually teaches you the same lesson: leave it plugged in and it slowly drains the battery; unplug it every time and it lives in the door pocket forever. This mini-box ELM327 solves it with a built-in power switch — flick it off when you park, on when you want data, and the dongle never leaves the port. Everything else is the family spec: ELM327 processor, compact box body, Bluetooth pairing to Android smartphones (password 1234), and app support across Easy OBD2, ScanMaster ELM and wOBD Crazy.

Function is the full scanner set: read generic and manufacturer-specific codes with 3000+ definitions, display their meaning, clear them and turn off the MIL, plus the live stream — RPM, calculated load, coolant temperature, fuel system status, vehicle speed, fuel trims, manifold pressure, timing advance, intake air temperature, air flow rate, throttle position, oxygen sensor voltages and fuel pressure. The honest notes: no iOS support (the WIFI and Bluetooth 4.0 versions cover iPhone), the adapter does not support all protocols so verify your car before ordering, and it reads status rather than performing repairs.

Key features

• Built-in power switch — no unplugging between drives
• 12 V operation, protected against short circuit and overvoltage
• 45 mA nominal idle current
• 3000+ code definitions, MIL reset, full live sensor set
• Android app support: Easy OBD2, ScanMaster ELM, wOBD Crazy

Specifications

Supported protocols

• SAE J1850 PWM (41.6 kbaud) and SAE J1850 VPW (10.4 kbaud)
• ISO 9141-2 (5 baud init, 10.4 kbaud)
• ISO 14230-4 KWP2000 (5 baud and fast init, 10.4 kbaud)
• ISO 15765-4 CAN (11-bit and 29-bit ID, 250 and 500 kbaud)

For households that keep a dongle permanently in the car, this is the version that makes that habit safe; unswitched shells live at CTC5531 (blue), CTC5471 (black) and CTC5491 (white).

Typical applications

• Leave-in installations on second cars and campers
• Battery-drain-sensitive vehicles with small starter batteries
• Anyone tired of fishing the dongle out of the glovebox

Samples, packing options, payment terms and warranty conditions are set out in How to Order and Delivery Information.