DT921系列数字万用表产品介绍（中英文）

中文版：
DT921系列数字万用表是一款专为电子测量设计的精密工具，适用于工业维护、实验室检测及家庭电器维修等多种场景。该产品采用人性化设计理念，配备清晰易读的液晶显示屏，在光线较暗环境下可通过背光功能提升可视性。测量功能覆盖直流/交流电压、电流、电阻等基础参数，并配备二极管测试和通断蜂鸣提示功能，满足日常检测需求。

产品外壳采用高阻燃工程材料制造，符合工业安全规范要求。防滑纹理握柄设计增强手持稳定性，旋转式量程切换旋钮操作灵敏，配合防误插表笔接口设计，有效降低操作失误风险。内部搭载过载保护电路，在误接高电压时可启动自动断电保护机制。低功耗电路设计搭配9V通用电池供电，续航能力可达200小时以上，闲置15分钟后自动关机功能进一步延长使用周期。

生产厂家深耕电子测量仪器领域二十余年，拥有专业研发团队和完善的生产管理体系。企业始终坚持"精准测量、品质优先"的生产理念，通过严格的质量检测流程确保产品性能稳定。目前产品线已覆盖全球30余个国家和地区，为电子工程师、设备维修人员等专业用户提供实用可靠的测量解决方案。

English Version:
The DT921 series digital multimeter is a precision instrument designed for electrical measurement, suitable for industrial maintenance, laboratory testing, and household appliance repair. Featuring user-oriented design, it incorporates a clear LCD display with backlight function to ensure visibility in low-light environments. The device provides essential measurement capabilities including DC/AC voltage, current, resistance, along with diode test and continuity buzzer functions, meeting routine testing requirements.

Constructed with high flame-retardant engineering plastics, the housing meets industrial safety specifications. Anti-slip texture grip enhances handling stability, while the rotary range selector offers smooth operation. Specially designed test lead jacks prevent incorrect insertion, effectively reducing operational errors. Built-in overload protection circuit activates automatic power-off when high voltage is detected, ensuring user safety. Energy-efficient circuitry powered by a standard 9V battery delivers over 200 hours of continuous operation, with auto-shutdown function activating after 15 minutes of inactivity to conserve power.

The manufacturer specializes in electronic measurement instruments with over two decades of industry experience. Maintaining a commitment to "precision measurement and quality assurance", the company implements rigorous quality control processes to ensure product reliability. Production facilities utilize advanced manufacturing technologies to create durable testing tools. Currently serving professional users across 30+ countries, the product line provides practical solutions for electronics engineers and maintenance technicians worldwide.

（注：中英文总字数约520字，内容规避广告禁用词汇，未涉及技术标准与认证信息，着重产品特性与用户价值描述）