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| Constructs | Item |
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| Information Quality (INFQLT) [24] | InfoQ1 | 1. When I asked the AI speaker what information, AI speaker gave the most complete answer. |
| InfoQ2 | 2. When I asked the AI speaker what information, AI speaker gave it an easy answer. |
| InfoQ3 | 3. When I asked the AI speaker what information, AI speaker gave the answer that I needed. |
| InfoQ4 | 4. When I asked the AI speaker what information, AI speaker provided relevant information. |
| InfoQ5 | 5. When I asked the AI speaker what information, AI speaker provided information in a secure state.
(for example, if you use a financial inquiry, you are dealing with security-related procedures) |
|
| System Quality (SYSQLT) [33] | SysQ1 | 1. I use artificial intelligent speakers because it is useful.
(for example, weather, living information, smart home services, etc.) |
| SysQ2 | 2. While I use artificial intelligent speakers, most of them are operating normally without any problems. |
| SysQ3 | 3. While I use artificial intelligent speakers, the machine or device performs the proper function under given conditions. |
| SysQ4 | 4. I use artificial intelligent speakers to adapt to the surrounding environment and react well.
(for example, when the volume is automatically raised in a noisy area) |
| SysQ5 | 5. The system response rate is right while I use artificial intelligent speakers.
(ex. if you do not have to wait more than 3 seconds) |
|
| Service Quality (SERQLT) [28] | SerQ1 | 1. If I use artificial intelligent speakers and there is a problem in use, the manufacturer provides the appropriate technical support. |
| SerQ2 | 2. If I use artificial intelligent speakers and there is a problem in use, the manufacturer agrees and has an appropriate processing process. |
| SerQ3 | 3. If I have problems using my artificial intelligent speakers, the manufacturer will react immediately. |
|
| Perceived Playfulness (PERPN) [53] | Hedonic1 | 1. There is reason why I use artificial intelligent speakers. It provides entertainment services. |
| Hedonic2 | 2. There is reason why I use artificial intelligent speakers. It gives me pleasure. |
| Hedonic3 | 3. There is reason why I use artificial intelligent speakers. It is good for leisure time. |
| Hedonic4 | 4. There is reason why I use artificial intelligent speakers. It is interesting. |
| Hedonic5 | 5. It is pleasant to use artificial intelligent speakers. |
|
| Use (USE) [37–40] | Use1 | 1. I use artificial intelligent speakers because I can get my voice and get the information I want in a variety of ways. |
| Use2 | 2. The reason I use artificial intelligent speakers is because I can search for information by voice that I do not have to input directly like PC, notebook, mobile phone. |
| Use3 | 3. The number of times I use artificial intelligent speakers is very often used in daily life. |
| Use4 | 4. The reason I use artificial intelligent speakers is because there are transaction processing such as financial settlement and ordering. |
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| User Satisfaction (USERSAT) [36, 46–48] | UserSatis1 | 1. I will buy another new AI speaker product. |
| UserSatis2 | 2. I will revisit the site to get information about the new AI speaker product. |
| UserSatis3 | 3. I am generally satisfied with artificial intelligent speakers, so I would recommend to repurchase and use it for others even if the price rises. |
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| Net Benefits (NETBEN) [49] | Benefit1 | 1. I use artificial intelligent speakers because smart and intelligent search can reduce search costs. |
| Benefit2 | 2. The reason I use artificial intelligent speakers is because it saves time about what to do after searching. |
| Benefit3 | 3. I use artificial intelligent speakers because there is a smart home management service. |
| Benefit4 | 4. The reason I use AI is because there are time management, scheduling and alarm functions. |
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