【Fit for Most Thick Cased Mobile Phones】:The internal size is about 18.3 * 8.7 * 1.5cm (7.2 * 3.4 * 0.59inch), Compatible with i-Phone 16 /16Pro/16Plus/16Pro Max/ 15 /15Pro/15Plus/15Pro Max/14/14Pro/13Pro/13 /12 Pro Max /12/11/X/XR/XS/8 Serials, Sum-Sung, Hua-wei etc.Cautions: some Folded phones not support. 【30 days long working Time with Auto-Timer】: Max working Time Reach Up 30Days Once Full Charge. Max setting Time is 99hrs and 59mins ,Super standby time over 90 days.Phone jail box with timer can make you reduce screen time, focus on work, study and life, effectively multiply your time. 【Mini Portable and Durable Design】: Easy-Carrying ,Lightweight, Fashionable Phone lock box , Make good Habit for Kids,Students,Adults. More respect and Love by lock box ,Make their Focus Back .There is reserved power on the motherboard of phone lock box, so It will unlock when time is up even battery runs out. 【Two Locking Ways Optional 】: Phone's Screen Face to You,You can Use Phones except Games by the small holes .Phone's Cover Face to You,Only Emergency Calling can use by Earphone Siri or Small Holes on the Transparent to answer/hang up the calling. 【Fault-tolerance Mechanisms】: Press power button twice to confirm the time setting, and there will be a 10 seconds countdown "hesitation period". At the "hesitation period", you can cancel the setting by clicking the power button one time, or it will be locked. As a last resort, there can only be used five in a lifetime for emergency unlocked, please use it with caution.