## 2 Literature Review  
According to [PERSON] et al. [2], TBSS includes telephone/interactive response, online/internet, and interactive kiosk, depending on the interface. Taekwondo academies use TBSS, such as social media and online applications, to connect masters, children, and their parents together [13]. In addition, various other services are provided via the TBSS, such as sending text messages when children enter the Taekwondo academy to obtain parents' trust and confidence. Furthermore, several studies have found that social media or service characteristics of Taekwondo academies influence training satisfaction and intention to continue [14; 15].  
[PERSON] [16], [PERSON] and [PERSON] [17], and [PERSON] and [PERSON] [18] have emphasized that ease is a significant factor in self-service technology. [PERSON] and [PERSON] [8] suggested the following attributes of self-service technology: functionality, enjoyment, safety/privacy, confidence, design, convenience, and customization [8]. [PERSON] and [PERSON] [19] proposed seven service quality items--functionality, enjoyment, security, confidence, design, convenience, and customization service--based on the attributes outlined by [PERSON] and [PERSON] [8]. However, [PERSON] and [PERSON] [20] argued that it is crucial to identify who is attracted to TBSS operations and design them to meet consumer demands because the attractiveness of TBSS varies.  
The most important reason why consumers use TBSS is to judge its economic or utility value and predict its usefulness [2]. [PERSON] [21] stated that the customer's experience value, such as the consumer's time, effort, and emotional energy, is determined according to the level of human and technical performance of the company. Perceived value is what one recognizes when the benefits outweigh the costs [22]. The perceived value of TBSS does not imply usability based on whether or not the technology is accepted, but it can measure the experience by encompassing overall emotions [23]. Therefore, when interacting with the technology, the user-perceived value of the TBSS characteristics is important [24]. In addition, perceived value is a broad concept formed by individual beliefs and attitudes [25]. Consumers may perceive the same product or service differently depending on their individual situation or subjective evaluation [26]. Therefore, a user's perceived value may vary depending on the characteristics of TBSS.  
Furthermore, because interactions with technology are repeated in the TBSS service environment, the characteristics of TBSS can be estimated to significantly affect users' intention to continue using it. This interaction is an important variable in understanding customer behavioral intentions [27] and has played an important role in increasing customer loyalty [28]. Notably, according to [PERSON] [29] and [PERSON] et al. [30], service characteristics such as usefulness, ease of use, and time of the technology base themselves induce motivation to use TBSS and influence mature use. Furthermore, [PERSON] [31] and [PERSON] [32] found that quality and perceived value significantly impact mobile service intention.  
In order to validate the influence relationship, the following hypotheses were established in this study based on this theoretical relationship.  
**Hypothesis 1 (H1)**.: _TBSS characteristics (enjoyment, usefulness, ease of use, reliability) have a significant positive influence on perceived value._  
**Hypothesis 2 (H2)**.: _TBSS characteristics (enjoyment, usefulness, ease of use, reliability) have a significant positive influence on the intention to use continuously._  
**Hypothesis 3 (H3)**.: _Perceived value has a significant positive influence on the intention to use continuously._