I only use this toothbrush
Color: blue / 1+1 promotion: white (+$6.50) / 3 additional toothbrush heads: No Need / 3 additional toothbrush heads 1: No Need / 3 additional toothbrush heads 2: No Need
One broke, so I bought another. The bristles of the toothbrush are the right size, so it cleans even the inside of the molars well. I only use this Xiaomi T100.