From the manufacturer

You're fully protected

6-proof peace of mind. The PRO Plus takes on life’s adventures with water9, temperature10, X-ray11, magnet12, drop13, and wearout14-proof protection.

¹ 4K UHD video support for 512GB, 256GB and 128GB cards. Host device compatibility may vary.

2The foregoing read & write speeds are based on internal tests conducted under controlled conditions. Actual speeds may vary depending upon card capacity.

3 Stated performance is achieved by using PRO Plus microSD cards with Samsung readers.

4 Test Device : Samsung Note Ultra

5 4K Video (3840*2160) 30fps (Video size 30Min 7.93 GB)

6 FHD Video (1920*1080) 30fps (Video size 30Min 2.95 GB)

7 Image 4000*3000 (Avg Pic size 2.36 MB)

8 Image 4000*1868 (Avg Pic size 1.81 MB)

9 Water proof: withstand up to 72 hours in seawater.

10 Temperature proof: operating temperatures of -25 C to 85 C; non-operating temperatures of -40 C to 85 C. 11 X-Ray Proof: up to 100mGy, equal to airport X-ray machines. 12 Magnetic-Proof up to 15,000 gauss, or the magnetic field equivalent of a high-field MRI. 13 Drop : withstand drops up to 5meters (16.4 feet) 14 Wearout: up to 10,000 swipes 15 Proofs are for the microSD card and do not include the adaptor. 16 Samsung is not liable for any damages and/or loss of data or expenses incurred from memory card data recovery.