All of them are working, although some have issues. The single unit costs 75, and the set is 250 for 8 units. The mobile one costs 100 riyal, supports STC Viva 4G LTE SIM card, and the battery must last very long. The rest are Mobily routers; may they be in good hands. Most of them are 4G LTE, except for one big white unit which is a signal booster supporting 5G and 4G, works on two frequencies but needs configuration adjustments costing 100.