Description/Features: Optimal Tracking Solution: Keep your loved safe with our shoe insoles designed specifically for . This hidden holder is perfect for tracking the movements of elders and children discreetly and effectively and Discreet: Made from high-quality materials, these insoles not only protect your but also remain hidden from view, providing peace of mind without drawing attention Specifications Due to different batches, there may be differences in product appearance and printed text, which not affect use Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.