This study aims describe the validity and reliability of the instructional guided inquiry model assisted by audiovisual media used in learning. The type research used is research development (Research and Development) with a modified development research design of the Borg and Gall model. The subject of this research is the XI IPA learning device at SMA Negeri 1 Gerung. Retrieval of research data through a validation questionnaire assessed by 4 validators, namely 2 physics lecturers and 2 physics teachers. The research data is in the form of qualitative and quantitative data from the validator's assessment of the learning tools developed. The learning tools include syllabus, lesson plans, student worksheet, video lessons and concept mastery tests. This study conducted a validity test to determine the characteristics and level of validity of the learning device. The validity data obtained were 3.33 (syllabus), 2.98 (RPP), 3.07 (LKPD), 3.08 (instructional videos) and 3.00 (concept mastery test). So that the average characteristics of learning devices are in the valid category with a validity level of 3.09, furthermore, the reliability test, the coefficient interval results obtained are 0.886 (syllabus), 0.808 (lesson plans), 0.829 (student worksheet), 0.894 (learning videos) and 0.702 (concept mastery tests). So that the average reliability coefficient interval is 0.823 with a very high category. The conclusion is that the learning device is feasible and reliable for use in learning.