Model: laser-303 Material: Hard Aluminum Surface treatment: Anodized Switch mode: Touch-sensitive switch Battery: 18650 rechargeable lithium battery / 16340 rechargeable lithium battery, remove the extended version and use the short version 16340 battery Wavelength: 532nm Light color: red light, purple light, green light available Working voltage: DC3.7V with key protection Size specifications: 22mmX160mm Weight: Single flashlight: 103g, flashlight + battery + charger: 182g, flashlight + battery + charger + color box: 274g, flashlight + battery + charger + plastic box: 271g Product Advantages: 1. Standard starry sky head 2. Made of aviation aluminum alloy, strong and durable; 3. There is a key at the end; when not in use, you can turn the switch key to the red dot and then pull it out to disconnect the power source 4. External focusing makes it convenient to adjust the thickness of the light beam and the size of the light spot 5. Suit comes standard with a full 1200mAh 18650 battery, large capacity and long battery life 6. Front switch, press to power on, release to power off for convenient use; Usage Scenarios: Sales Model Instructions, Astronomical Star Guide, Teaching Instructions, Factory Command Large quantities can be customized with customer logos Self-service shopping has products available for purchase; if you like something, you can follow the process to buy it yourself! Color Difference: All products in our store are photographed in kind. Due to different monitors, there may be color differences. Detailed descriptions are provided. If you are unsure, please consult customer service before purchasing. Dear customer, please specify which courier service you would like for delivery after placing your order. If no specification is made, we will default to our store's preferred courier. For areas not covered by the default courier, we will use EMS.If you have any special requirements for the product, please specify in the message to the seller! When signing for a package, please make sure to open it in front of the courier, check if the goods are damaged, verify if the quantity is correct, and if there are any issues, refuse to sign.Once signed for, it is considered that the product has been acknowledged. We take great care in managing our store and attach great importance to your reviews, always striving to be the best and forming friendly long-term partnerships with buyers.If you are not satisfied with the goods after receiving them, please do not leave a negative review without saying anything.Because a negative review is not a solution for either of us.We can't let your dissatisfaction turn into satisfaction! Thank you for your strong support! ^_^ For returns and exchanges due to quality issues, the seller will cover the return shipping fee; for non-quality issues, the buyer will cover the shipping fee.Note: Please make sure to check the package promptly upon receipt. If there are any quality issues, please contact us within two days after signing for the package. Otherwise, we cannot determine whether the quality issue is caused by the shipping or the buyer.