diamond gemstone selector tool sound light indicator high accuracy gems tester
1. Compact and lightweight design for easy carrying(only 38.5g). 2. DIY a power bank for your phone. 3. Indicator light show charging progress. 4. Please charge the batteries with USB cable or other chargers. 5. Compatible for 2 x 18650 Li-ion rechargeable batteries (not included). 6. Support voltage and over-current protection, short circuit protection. 7. Widely compatible for i. Phone, i. Pad, Samsung, LG, Sony, MP4, PSP, camera, etc. Warm reminder: This product does not include batteries. The battery in the picture is only used to demonstrate how to use the product
