Model W11 Light bulb XPG+LED (red light) Product Dimensions Lamp head diameter 4.7CM, length 8CM*width 7CM Net weight 109G (excluding headlamp strap) Box size 9.5*8.8*6.8CM Gross weight 166G Material ABS Switch Main light switch + sensor switch Battery Built-in 2000mAh 18650 battery Charging method Type-C USB charging Gear position Main light 5 modes: XPG medium light - XPG strong light - XPG fast flash - LED red light - LED red light flash. If you stay in any mode for more than 8 seconds and then click to turn on, the device will shut down Sensing mode 2: XPG medium light - XPG strong light Zoom mode Non-illuminated fixed-focus lens Waterproof rating IPX4 Lumen 400 lumens Range 50- 100m Features With sensor, side light with red light warning Battery life 4-4.5 hours Charging time 4-6 hours Indicator light When charging, the indicator light glows red. When activated, the red indicator light at the top remains constantly lit The package contains Headlamp + headlamp strap + black USB cable + color box. Box size: 120PCS 45.5*40*42CM, approximately 21KG Model W12 Light bulb XPG+2*COB+LED (red light) Product Dimensions Lamp head diameter 5.5CM, length 8CM*6CM Net weight 100G (excluding headlamp strap) Box size 9.5*8.8*6.8CM Gross weight 156G Material ABS Switch Main light switch + sensor switch Battery Built-in 2000mAh 18650 battery Charging method Type-C USB charging Gear position Main light 5 modes: 2*COB strong light - XPG strong light - 2*COB fast flashing - LED red light - LED red light flashing. If you stay in any mode for more than 8 seconds and then click to turn on, the device will shut down Sensing switch 2 modes: 2*COB strong light - XPG strong light Zoom mode None Waterproof rating IPX4 Lumen 400 lumens Range 50- 100m Features With sensor, side light with red light warning Battery life Strong light for 3-3.5 hours Charging time 4-6 hours Indicator light When charging, the indicator light glows red. When activated by sensor, the upper red indicator light remains constantly on The package contains Headlamp + headlamp strap + black USB cable + color box 120pcs Model W11-COB Light bulb LED+18*COB white light+9*COB red light Product size/net weight 7.5*6.5*4.5CM 43G Box size/gross weight 9.3*8.6*6.5CM 70G Material ABS Switch Dual push-button switch (power switch + sensor switch) Battery Built-in 2000mAh 18650 battery Charging method Type-C USB charging Charging time/battery life Charging time: 3.5 hours Battery life: 4-4.5 hours Gear position Fifth mode: 18*COB strong light - LED strong light - 18*COB rapid flashing - 9*COB red light - 9*COB red light flashing The first two settings of the sensor switch can detect and stop Press for 8 seconds again to turn off Zoom mode None Waterproof rating IPX4 Lumen/Range 400-600LM 50-100m Features With COB, with sensor, side light with red light warning Indicator light The red light turns on when charging The package contains Headlamp + USB cable + headlamp strap + color box W12 W11-COB 1. The manufacturer provides genuine products directly from the source. The company has a short production cycle, product quality is guaranteed, and supply is stable. We welcome new and returning customers to place orders with us 2. Regarding the size, the measurements are taken manually, and due to differences in measuring tools and methods, there may be a 2mm error. Please understand. 3. The main color is black, but other colors can be customized. Due to differences in computer display screens, there may be a slight color difference between the actual product and the picture. 4. Regarding customer service, your inquiry was not responded to promptly, possibly due to high inquiry volume or a system malfunction. We apologize for this and will respond to your question as soon as possible. 5. Regarding after-sales service, we will provide comprehensive after-sales support. We will provide warranty for any damage to the product's exterior and light bulbs, and guarantee the authenticity of our products. 6. Regarding shipping, the courier companies we cooperate with are YTO Express, STO Express, U-Speed, and SF Express.There are also various freight companies that can ensure the timely delivery of your goods. Regarding inspection and maintenance: Our company's products are thoroughly inspected before shipment to ensure there are no issues before they are released, and generally, there are no problems.However, during transportation, due to bumps, moisture, and other factors, some problems are inevitable.If the light source does not light up or only emits a dim light, please follow the following methods for repair: Before performing maintenance, please ensure that all the threads of the flashlight are tightly tightened and not loose. If some threads are not tightly tightened, it may also be the cause of the flashlight not lighting up or only lighting up dimly. 1. Check the battery: Make sure the battery has power and insert it into the flashlight in the correct direction. Do not use batteries of different brands, and do not mix old and new batteries. 2. Determine the fault: Unscrew the back part to expose the negative terminal of the battery, then use a metal piece such as a key or tweezers to connect the negative terminal of the battery to the exposed, unoxidized part of the flashlight body, and see if it lights up.If possible, it's a problem with the flashlight switch.Please follow step 3 for inspection. If it still doesn't light up, please check the solder joints between the circuit compartment and the circuit board for any open or loose welds. If there are any, please re-solder them to resolve the issue. 3. Check the tail cover switch: Unscrew the end of the flashlight and you will see that the outer ring of the switch cap has a switch pressure ring with two recesses. Use scissors or a sturdy pair of tweezers to insert into the two recesses and turn clockwise to check if the switch pressure ring is loose. Make sure the switch pressure ring is tightly pressed against the switch and there should be no looseness. 4. Check for poor contact: When the flashlight does not light up or has poor contact, check whether the lamp head is loose, inspect the tail cap to ensure the switch is tightly screwed and well-connected, and ensure that the copper post of the tail cap is in good contact with the metal ring of the tail cap. 5. Other issues: If the above methods still cannot resolve the issue, please contact our customer service, and we will assist you in resolving the problem.