Background: In many low- and middle-income countries (LMICs), health system capacities to address the burden of non-communicable diseases (NCDs) are often inadequate. In these countries, wearable health technologies such as smartbands and smartwatches could be used as part of public health programmes to improve the monitoring, prevention, and control of NCDs. Considering this potential, a study was conducted in Cambodia to explore user experiences and perceptions of a watch-type health wearable, including utilisation patterns, perceived usefulness and usability, and willingness to pay. Methods: Data collection involved a baseline survey, conducted in 2019 with different categories of participants (including hypertensive participants, non-hypertensive participants, postgraduate students, and civil servants), and a follow-up survey with the same participants, one month after they were given a sample of the wearable and advised to wear it day and night. Results were analysed using descriptive statistics, test statistics, and binomial regression to predict the utilisation of the paired smartphone application. Results: A total of 156 adult participants completed the baseline and follow-up surveys. The reception of the technology was positive overall: 89.1% of the participants said they would continue using the watch and 76.9% of them would recommend it to either friends or relatives, while 94% said the device stimulated them to think more frequently about their health\. However, challenges to technology acceptance were identified, including concerns with the accuracy and quality of the device and unfamiliarity with the concept of health self-monitoring, especially among the elderly. Short battery life and cost were also identified as potential barriers to continued use. Conclusions: Health wearables are a promising new technology that could be used in Cambodia and in other LMICs to strengthen health sector responses to the challenges of NCDs. However, this technology should be carefully adapted to the local context and the needs of less resourced population groups. In addition, further research should investigate if adequate health sector support and infrastructure are in place to implement and sustain the technology.