1. Mobile phone base elasticity test board is a small diagnostic tool, suitable for Phone, battery or base plug detection.2. You can disassemble the free test to quickly and easily find the phone problem.3. Dimensions: 30X27 mm4. Pin definition: --1- Identification / Control --2 channels 1 negative --3 channels 1 positive --4 Power / Battery --5 Identification / Control 0 --6 channel 0 negative --7 channel 0 positive --8 Ground5. Weight: 0.0034KG

http://olla.gr/2-pcs-free-disassembly-detection-tail-plug-test-board-for-android/