The non-customary gameplay of the bonus function is triggered when 3 identical symbols (full protection of the first reel) are given and the same symbol can also be shown on 3,four or 5 reels. https://Products-Dd.com/%E0%B9%81%E0%B8%AD%E0%B8%A3%E0%B9%8C/%E0%B9%81%E0%B8%AD%E0%B8%A3%E0%B9%8C-hisense-%E0%B8%94%E0%B8%B5%E0%B9%84%E0%B8%AB%E0%B8%A1-%E0%B8%A3%E0%B8%B5%E0%B8%A7%E0%B8%B4%E0%B8%A7%E0%B8%82%E0%B9%89%E0%B8%AD%E0%B8%94%E0%B8%B5-%E0%B8%82/