irocks K77R 2.4GHz Wireless Fun Building Blocks Keyboard

https://www.youtube.com/watch?v=hNdblUIuJ3w Specifications 【Product specifications】 keyboard Product Name: Wireless Fun Building Blocks Keyboard Product model: IRK77R Connection interface: wireless 2.4GHz Number of keys: 104 keys (depending on the language of the keyboard) Button type: Membrane switch Key travel: 4.0 mm Button load: 55±15g Transmission distance: about 10 meters (technical theoretical value, without any obstacles) Battery power: About 12 months (4 hours a day, 5 days a week) Key percussion life: more than 20 million times Power supply: 2 AAA batteries (it is recommended to use Energizer or Jinding alkaline long-lasting batteries) Product size: 455(L) × 173(W) × 27(H) mm Product weight: about 750 grams (excluding batteries) Country of Manufacture: Mainland China Warranty period: 2 years NCC certificate number: CCAF18LP115OT1 BSMI: T34254 receiver Interface: USB Dimensions: 18.0 (L) x 13.1 (W) x 5.7 (H) mm system requirement Microsoft Windows Windows 7, Windows 8.1 or Windows 10 USB port standard equipment 【Product content】 Wireless keyboard x 1 Small Receiver x1 AAA alkaline battery x2 Quick Installation Manual x 1 Decorative plaque x1 Building block trim x4 (optional) Guarantee card x1