1、With Charging Case: The electronic dice come with a charging case with a charging port, which makes it easy to charge electric dice from a power bank/power adapter/computer etc. 2、Long Lasting light: The dice flash for 20 seconds at a time instead of the previous 10 seconds, which is making the game even more enjoyable! 3、Rechargeable: LED dice light up automatically and go out when bumped or rolled. The polyhedral dice set comes with a rechargeable compartment that charges for 2 hours and continues to light up for 6 hours for multiple uses. 4、Game Dice Set: When shaking the black dice, the illuminated dice will emit red, blue, green and other coloured lights to increase the aura of the game. 5、Polyhedron: The dice set consists of 7 black dice including D4, D6, D8 and D10 (double accuracy), D9 (odd), D12 and D20. you can take tabletop gaming to the next level! Item Type: LED dice set Material: ABS Charging Case Size: Approx.10 x 7 x 3.6cm / 3.9 x 2.8 x 1.4in Battery: Lithium Battery (built in) Single Dice Battery Capacity: 25mAh Charging Time: 2h Using Time: 6h Quantity: A set of 7 (including 20 sides, 12 sides, 8 sides, 6 sides, 4 sides, 2pcs 10 sides) 1 x Charging Box 7 x LED Dice 1 x USB Cable 1 x Instruction Manual