Features: 2) C200: vibration remind design product with intermittent vibration without interruption to third party 3) When the card is taken out, the product can intermittently alarm or vibrate without sound to remind the owner. It will remind per 10-12 seconds in the first half a minute, and then remind per 5 seconds after a half minute. It will not stop working until the card is put back in position 4) Smart MCU controlled design, the remind frequency increase steadily to have the zero interruption to the user 5) Card design, easy to carry in the purse or bag. It can store 5 credit cards at the same time 6) We can offer colorful printing as required on the surface of the product 7) Dimensions: 84 x 53 x 5.5mm