Safety Evaluation of the Hybrid Closed Loop (HCL) System in Pediatric Subjects With Type 1 Diabetes

The study will proceed as follows: Run-in Period - General: A total of up to 200 subjects (age 2-13) will be enrolled at up to 15 investigational centers (14 in the US, 1 EMEA) in order to reach 120 subjects who will complete the HCL study. Study Period - At Home: Following the two week run-in period using the Study Pump (670G), all subjects (age 2-13) will participate in a 3-month study period. Study Period - Hotel Study Subjects (age 7-13) will participate in a Hotel study (6 days, 5 nights), with the remainder of the study period to be spent at home. Subjects 2-6 years of age are not required to participate in a hotel study. Instead, they will participate in an out-of-home study for 5 consecutive days, 4-6 hours per day. Continued Access Program Subjects will be given the opportunity to extend use of their study devices for a period of up to 3 years . If subjects choose to participate in the continuation period, they will retain the study devices at the end of study period visit or receive them back in the event they have been returned to study staff already.