1. 서론
Thank you for choosing the Harbor Freight Quantum 3700 Lumen Ultra-Bright LED Zoom Flashlight, Model QFL-3700. This manual provides essential information for the safe operation, setup, maintenance, and troubleshooting of your new flashlight. Please read this manual thoroughly before use and retain it for future reference.
The QFL-3700 is designed for powerful illumination with its 3700 lumens and adjustable zoom function, making it suitable for various tasks requiring bright, focused, or wide-area lighting.
2. 안전 정보
- 눈 안전: LED 조명을 직접 쳐다보거나 사람이나 동물의 눈에 직접 비추지 마십시오. 강한 빛은 일시적인 시력 저하 또는 영구적인 눈 손상을 유발할 수 있습니다.
- 배터리 안전:
- Use only the specified battery type (12 AA Alkaline batteries).
- Ensure correct battery polarity (+/-) when installing.
- 오래된 건전지와 새 건전지, 다른 종류의 건전지를 혼용하지 마세요.
- 장기간 손전등을 사용하지 않을 경우 배터리 누액을 방지하기 위해 배터리를 제거하십시오.
- 사용한 배터리는 현지 규정에 따라 책임감 있게 폐기하십시오.
- 충전이 불가능한 배터리는 충전하지 마십시오.
- 열: The flashlight may become warm during prolonged use. This is normal. Avoid covering the flashlight or placing it on heat-sensitive surfaces during operation.
- 방수 기능: 이 손전등은 방수 기능이 없습니다.. Avoid exposure to water or high humidity to prevent damage.
- 어린이들: 어린이의 손이 닿지 않는 곳에 보관. 이것은 장난감이 아닙니다.
- 저장: 사용하지 않을 때는 손전등을 서늘하고 건조한 곳에 보관하십시오.
3. 패키지 내용
다음 품목이 패키지에 포함되어 있는지 확인하세요.
- Harbor Freight Quantum 3700 Lumen Ultra-Bright LED Zoom Flashlight (QFL-3700)
- AA 알카라인 배터리 12 개
4. 제품 특징

Image 1: Diagram illustrating the key features of the QFL-3700 flashlight, including its super-bright 3700 lumens, 850 ft range, up to 13-hour run-time, adjustable focus, high-grip aluminum barrel, easy-access protected on/off switch, 12 AA battery compartment, twist-to-zoom mechanism, and ridged collar.
- 매우 밝은 조명: Delivers 3700 lumens for powerful light output.
- 확장된 범위: Projects light up to 850 feet (approximately 259 meters).
- Long Run-Time: 최대 13시간 연속 작동이 가능합니다.
- Adjustable Focus (Zoom): Twist-to-zoom mechanism allows seamless transition from a wide floodlight to a narrow spotlight.
- 내구성 있는 구조: Features a high-grip aluminum barrel and aluminum body with rubber-coated ends for enhanced durability and secure handling.
- Easy Access On/Off: Protected power switch for convenient and reliable operation.
- 전원: AA 알칼리 건전지 12개(포함)로 작동합니다.
5. 설정
5.1 배터리 설치
The QFL-3700 flashlight requires 12 AA alkaline batteries for operation. The batteries are included with your purchase.
- 손전등의 꼬리 캡을 시계 반대 방향으로 돌려서 풉니다.
- Insert the 12 AA batteries into the battery compartment, ensuring correct polarity (+ and -) as indicated inside the compartment. Incorrect installation can prevent the flashlight from working and may damage the unit or batteries.
- Carefully screw the tail cap back onto the flashlight by turning it clockwise until it is securely tightened. Do not overtighten.
- Test the flashlight by pressing the power button.

Image 2: A hand gripping the QFL-3700 flashlight, illustrating its size and the high-grip aluminum barrel texture. This image helps visualize the handling of the flashlight during battery installation and operation.
6. 사용 설명서
6.1 켜기/끄기
The power button is located on the tail cap of the flashlight. It is designed for easy access and is protected to prevent accidental activation.
- To turn the flashlight ON, firmly press the power button until it clicks.
- To turn the flashlight OFF, firmly press the power button again until it clicks.
6.2 Adjusting the Zoom (Focus)
The QFL-3700 features an adjustable focus mechanism, allowing you to switch between a wide floodlight and a concentrated spotlight.
- To adjust the focus, gently twist the head of the flashlight.
- Twist in one direction for a wider beam (floodlight).
- Twist in the opposite direction for a narrower, more focused beam (spotlight).
- Adjust the focus as needed for your specific lighting requirements.

Image 3: The Harbor Freight Quantum QFL-3700 flashlight in its full form, showcasing the head, barrel, and tail cap. This view helps users identify the components mentioned in the operating instructions.
7. 유지관리
- 청소: 손전등 본체를 부드러운 천으로 닦으세요.amp 천. 연마성 세척제나 용매를 사용하지 마십시오.
- 배터리 교체: Replace all 12 AA batteries when the light output diminishes significantly. Always replace all batteries at the same time with new ones of the same type.
- 장기 보관: If the flashlight will not be used for an extended period (more than one month), remove the batteries to prevent potential leakage and damage to the flashlight.
- 매끄럽게 하기: The O-rings and threads may benefit from occasional lubrication with silicone grease to maintain smooth operation of threads and prevent wear.
8. 문제 해결
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 손전등이 켜지지 않습니다. |
|
|
| 빛이 어둡거나 깜빡입니다. |
|
|
| 줌 기능이 뻑뻑합니다. |
|
|
9. 사양
| 모델: | QFL-3700 |
| 빛의 출처: | 주도의 |
| 명도: | 3700루멘 |
| 빔 범위: | 최대 850피트(259m) |
| 실행 시간: | 최대 13시간 |
| 전원: | AA 알카라인 배터리 12 개 |
| 재료: | 알류미늄 |
| 특징: | Adjustable Focus (Zoom) |
| 방수 기능: | 방수가 되지 않음 |
10. 보증 및 지원
For information regarding warranty coverage, technical support, or replacement parts, please refer to the original purchase documentation or contact Harbor Freight customer service directly. Contact details can typically be found on the official Harbor Freight web사이트 또는 제품 포장에 표시하세요.
Please have your product model number (QFL-3700) and purchase date available when contacting support.





