High Quality Promotion Ceramic 8GB Gift USB ceramic material.good USB chip ... .256MB,512MB,1GB,2GB,4GB, 8GB, 16GB, 32GB,64GB Customized High Quality Chinese Style Promotional Novelty Ceramic 8GB Gift USB Shape OptionsBracelet ... °C)Storage temperature–20°C to 70°COperation Relative Humidity20% ~ 90%(40°C)Storage Relative Humidity:20% ~ 93%(40°C)Operating current40mA ...