Rubytec Tetra USB Flashlight The Tetra is a clever USB flashlight that you can easily mount by hanging it up or mounting it on the bicycle handlebars for better visibility on the go. The lamp is charged via the built-in USB connection. The Tetra is made of ABS and silicone and has a total length of 12 centimeters and a weight of only 15 grams. The Tetra can produce white or red light Specifications: Color: green Gender: unisex Material: ABS, silicone Dimensions: 12 x 3 x 2 cm (LxWxH) Weight: 15 grams