The solar network meter consists of 5 solar charging panels. When light shines at any angle, there are 3 sides to charge built-in 4000mAh large battery, which is more than 50% more efficient than 3 solar charging panels of same type; solar energy + charging dual-purpose, unlimited solar energy endurance, transmission distance of 12 nautical miles, with 12W high-power transmission, stable signal, after power is exhausted, it automatically start and run when energy reaches more than 5%. The flash light is self-adjustable. Unlimited solar energy endurance, strong flash light, 5 solar charging panels, more than 50% higher charging efficiency than similar products. Four core features: 12W power, dual power tubes visible to eye, 12W, strong signal transmission, longer distance, more stable signal. 11-12 nautical miles, transmission distance of 11-12 nautical miles, actual test feedback from users in Guangdong, , , and Vietnam. Solar unlimited battery life + flashing light, factory default update time of 2 minutes and 15 seconds, 8.4V 4000mAh battery + 5 solar charging panels, flashing light color can be adjusted independently. Waterproof grade IPX7, thickened upgraded waterproof seal ring + built-in waterproof sealant waterproof grade above IPX7, extremely strong waterproof performance. Double-layer waterproof seal ring, thickened upgraded outer waterproof seal ring + internal waterproof seal ring double-layer waterproof effect, waterproof grade above IPX7. 5 solar charging panels design, 3 charging panels charge built-in 4000mAh large battery at any angle of light, and other 2 panels also charge in weak light, which is more than 50% more efficient than similar solar panels. Precautions: 1. Before use, please charge with dedicated charger for this product. The charger light turns green to be full, and delay of 0.5-1 hour after turning green is more sufficient! 2. If not used for a long time, it is recommended to store it fully . It is strictly forbidden to store it with low power to avoid reducing battery life or even failing to charge. 3. Be sure to tighten lid before use to prevent water from entering; 4. The lid needs to be tightened even if it is not used for a long time to prevent charging head from oxidizing and causing failure to charge. 5. The battery of position meter is a high-energy, high-density lithium battery. It needs to be placed in a safe place for charging and storage to prevent combustion, explosion, fire, and personal injury. If it is not and stored as required, the user shall bear loss. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on Voltage:AC100-240V Color: As Shown Material: plastic Package Contents: 1 * Positioning Instrument Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.