Technical Specifications: Storage Capacity: 8 GB Operating Temperature: -40°C to 85°C, 8% to 95% RH (no condensation) Compatibility: Hioki instruments with SD card support shop.hioki.eu/Z4003-SD-Memory-Card-8GB/Z4003?srsltid=AfmBOorzXu-6CflXzrU6et5aNUnpZrROLeqgpaZXZeZe2-Z4ZPlgzn77