Longruner LW21 Multi Function Tester Instruction Manual

Longruner LW21 Multi Function Tester

Specifications

INTRODUCATION

To AliExpress Merchants and Consumers: This manual is compiled in strict compliance with platform regulations to ensure the product meets the legal requirements of the EU and other sales destinations, and to protect consumers’ legitimate rights and interests. Merchants must enclose this physical manual with the product. Please read the following compliance requirements and usage instructions carefully.

Warning / Safety Information

Please read the following safety information carefully before using the product to avoid equipment damage, personal injury, or property loss. Key safety details have been disclosed on the product page to ensure consumers are fully informed before purchasing.

1. Power Connection: Use a power adapter matching the product’s rated voltage (preferably original or genuine brand adapters). Avoid fast-charging devices (if not marked as fast-charge compatible) to prevent circuit overload, short circuits, fires, or electric shocks.
2. Environmental Requirements: Do not place the product in high-temperature (>60℃, e.g., direct sunlight, near ovens), humid (rainy days, bathrooms), dusty, or strong magnetic field environments. This may cause malfunctions, battery swelling, or performance degradation.
3. Child Supervision: Children under 12 must be supervised by adults when using the product. Prevent accidental ingestion of small parts, contact with power interfaces, and avoid excessive volume (for audio-visual products) or prolonged use that may damage eyesight/hearing.
4. Prohibition of Modification: Do not disassemble, modify, or repair the product yourself. Disassembly may cause battery leakage or short circuits and will void the warranty.
5. Abnormal Handling: If the product shows overheating, abnormal noise, peculiar odors, smoke, or electric leakage, immediately disconnect power/stop use, keep it away from flammables, and do not disassemble it yourself.
6. Battery Safety (for products with built-in/removable batteries): Do not short-circuit, squeeze, or incinerate removable batteries. Dispose of waste batteries in accordance with local environmental regulations; do not mix with household garbage. For built-in batteries, charge to 50%-70% if unused for over 1 month and recharge regularly.

Warning: Strictly follow these safety norms to avoid personal injury and property loss. Do not overload or misuse the product. Wear protective gloves and goggles during operation to prevent scratches or debris hazards. Do not use the product as a hammer or pry bar to avoid breakage. Minors are prohibited from use. Adults must concentrate and avoid operation under the influence of alcohol or fatigue. For more safety standards, refer to “AliExpress EU-bound Product Warning Compliance Guidelines”.

Basic Operations (General Version)

1. Power On/Off: Press the power button (duration as indicated on the product). The indicator light will turn on/flashing for power on, and off for power off. Some products support automatic power on/off.
2. Connection & Pairing: Bluetooth-enabled products enter pairing mode automatically (indicator light flashes alternately after power on). Turn on your device’s Bluetooth, search for the product model, and click to connect. Wired products can be directly plugged into corresponding interfaces (USB, HDMI, etc.)—ensure a secure connection.
3. Function Control: Operate via product buttons, touch panels, or remote controls (refer to product markings for button functions). Avoid excessive force when pressing buttons to prevent damage.

Note: Operation methods vary by product type (e.g., power tools require additional power compatibility checks). Follow specific guidelines for your product.

Charging & Battery Life (for rechargeable products)

1. Charging: Connect the product to a power adapter using the included charging cable. The indicator light stays red during charging and turns green/blue or goes off when fully charged. Unplug the cable after charging.
2. Battery Life: Full charge provides approximately 10h. Frequent use of high-power functions (e.g., Bluetooth, backlight) reduces battery life—use moderately.
3. Precautions: Do not use the product while charging to avoid overheating. Recharge regularly if unused for a long time to prevent permanent battery damage.

Usage Restrictions

1. Device Compatibility: Only compatible with devices supporting the required interfaces/protocols (e.g., Bluetooth version, system version). Incompatible devices may cause unstable connections or malfunctions.
2. Working Range: Bluetooth products typically have a 10-meter effective range (reduced by walls, metal, or obstacles). Wireless products must be used within signal coverage.
3. Scenario Restrictions: This is a consumer electronic product—do not use in medical, industrial, aviation, or other professional settings. Avoid use while driving or operating precision instruments to prevent distractions.
4. Other Restrictions: Do not use the product for illegal purposes. Comply with local laws and regulations.

Daily Maintenance & Warranty

Daily Maintenance

1. Cleaning: Disconnect power first. Wipe with a dry, soft cloth—avoid corrosive liquids (e.g., alcohol, disinfectant) to prevent damage to the casing or internal components.
2. Storage: Clean the product before long-term storage. Store in a dry, well-ventilated place—avoid extrusion or impact.
3. Inspection: Regularly check for damaged power cables or interfaces. Stop use immediately if damage is found.

Disclaimer

1. The manufacturer is not liable for product malfunctions caused by force majeure (e.g., earthquakes, fires, natural disasters), improper use, overload, third-party damage, or cross-border transportation accidents.
2. Warranty is void if the product is disassembled, modified, repaired with non-original parts, or improperly repaired—no liability is assumed for resulting damage.
3. This manual provides installation, operation, and maintenance guidance. Product parameters and functions may change with version updates—please refer to the actual product.