Features: 1. High Thermal Conductivity Graphene, Effectively Reducing Body Temperature. 2. Graphene Has Extremely High Thermal Conductivity. When Used In High-Standard Video Recording Mode, The Body Temperature Can Be Reduced By About 8°C. 3. The Grip Is More Comfortable. When Recording 8k Videos For A Long Time, The Use Of A Heat Dissipation Case Can Effectively Reduce The Body Heat And More Comfortable To Hold. 4. Protect The Fuselage From Collision With Foreign Objects, Scratches And Dust 5. Anti-Lost Hand Strap For Safe . You Can Mention It At Any Time Between And Feel Relaxed. Description: 1. Product Name: Graphene Temperature Control Protective Case + Anti-Lost Rope 2.Model: X4-SD813 3. Applicable Models: for X4 4. Material: Graphene composite + polyester colour: As shown Package Contents: 1 x Protective Case 1 x Lanyard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.