# LanRui M191 Universal Switch Clip (Universal Boot Cable)
The LanRui M191 Universal Switch Clip is a professional Universal Boot Cable designed for powering on and diagnosing smartphones and tablets without using the original battery. It enables technicians to quickly boot compatible devices, detect current flow, and troubleshoot motherboard-related issues, making repair work faster and more efficient.
## Key Features
• Universal Boot Cable for smartphones and tablets.
• Supports iPhone, iPad, and non-encrypted Android devices.
• Quick and convenient device power-on.
• Built-in current detection with LED indicator.
• Two working modes: Detection Mode and Power-On Mode.
• Compact, lightweight, and easy to use.
• Ideal for professional mobile phone repair technicians.
## Dual Operating Modes
### Mode 1 – Detection Mode
• Enables current detection with approximately 0.01A micro-current.
• LED indicator lights up when current passes through.
• Helps identify power-related faults during diagnosis.
### Mode 2 – Power-On Mode
• Functions as a standard boot cable for powering on compatible devices.
• No micro-current or LED indication in this mode.
• Useful for checking motherboard leakage and power behavior.
## LED Indicator
A flashing LED indicates an unstable power supply or repeated restart of the motherboard, helping technicians diagnose power-related faults quickly.
## Compatibility
• iPhone Series
• iPad Series
• Non-Encrypted Android Smartphones
• Compatible Tablets
