1. Material: ABS+ aluminum alloy. 2. Surface treatment technology: sun pattern + polishing + process pattern + vacuum plating. 3. Sizes: 26.8*166mm, weight: 158g. 4. Clamp range: 55-88mm. 5. Maximum expansion length: 680mm. 6. Connection method: Wireless connection. 7. Applicable mobile phone: 4.7-6 inch mobile phones. 8. Applicable scene: indoor and outdoor.