Waveshare 7.5inch Passive NFC Powered e Paper No Battery Wireless Powering and Data Transfer

Adopts Novel Passive NFC Technology No batt Required, No More batt Life Trouble. Wireless NFC-Powered Display Refreshing.Passive NFC Solution, No batt Required, No Messy Wiring, Stable Operation. To Refresh The Display Content,Use A Smart Phone With NFC Function, Or An NFC Reader,Close To The E-Paper For Both Wireless Powering And Data Transfer. Suitable For Price Tags, Asset/Equipment Tags, Shelf Labels, Conference Name Tags. This product requires higher NFC power for refreshing due to its large size, therefore, we recommend the ST25R3911B NFC Board + Micro SD Card solution. If a smart phone is used for refreshing, please make sure it has enough NFC output power, otherwise it may be not working.