We have patent of this item. There some advantages than other electronic bristle dartboard. 1.Product specs& size:diameter 342 mm. 2.Dartboard frame and triangular spider is an integral-shaped with 80 anti-strike point inside.All these make product elegant,firm abd durale. 3.The inner scoring area and triangular spider is permanent structure design and its smoothly slide surface makes darting rate higher. 4.25&50 scoring area use triangular slide which can scoring actually. 5.Every slide of triangular spider is smooth.Dart can not be drop easlily. 6.The dartboard adopts 360 degrees inner moveable structure.When high-score area damaged,you can rotate as you want to low-score and other positions so as to balance usage.The life of this kind products is at least 8 longer than normal bristle electronic one. 7.Remarks:inner movement can be finished within several seconds without any tool. 8.Number circle is integral with inner sisal fiber which can protect steel tip and makes dart hard to drop down. 9.Dartboard IC display adopts special plastic which protect inner electronic from dropping dart.