eekoo 256GB U3 TF(Micro SD) Memory Card, Minimum Write Speed: 30MB s, Flagship Version 1. The core is strong and durable. 2. Compatible with devices with TF card slots while retaining the excellent speed and performance of TF memory cards. 3. Compatible with most of the driving recorders on the market, you can record more videos and store more map information to protect your safety. 4. After the SD card is changed, it can be used for SD card-compatible ordinary card cameras, professional SLR cameras or other devices that support SD card slot, and fully utilize the device performance. 5. Adopt U3 grade high-speed transmission to make the product write speed above 30MBs, and use high-speed UHS-1 interface to ensure the stable performance of the device and 4K 2K video recording. 6. Can withstand the cold weather from -25 degrees Celsius to high temperature of 85 degrees Celsius. 7. It can withstand tap water for 1 minute and soak for 30 minutes. 8. Resistant to magnetic fields 13 times higher than home theater audio. 8. Even if you fall off a 15-story building, you can continue to use it. Parameters: 1. Reading speed: 80MBs. 2. Capacity: 256GB. 3. Minimum write speed: 30MBs. 4. Product size: 15x11x1.0mm. 5. Working temperature: -25-85 degrees Celsius. 6. Memory card temperature: -40-85 degrees Celsius. 7. Product weight: about 0.5g. 8. Speed class: U3. 9. Working voltage: 2.7-3.6V. 10. Compatible devices: digital camera SLR, mobile phone, tablet, monitor, driving recorder, etc. Note: Some digital devices need to be equipped with an SD card slot to be used.