The Caliburn Tenet Koko kit from Uwell has a square shape with bolt and rivet patterns for anti-slip performance. Powered by a 950 mAh large battery with 2 A fast charging, the kit provides vapers with longer battery life and lower charging frequencies. Vibration and light indications deliver a more interesting vaping experience by showing real-time working states. In addition, the kit is attached to an exquisite metal lanyard for convenient on-the-go sessions.