The Bicycle safety tail light is a quality and bright rear bike light. Unique design enables this light to be mounted either horizontally or vertically. Seven flash patterns: blinking, solid, and chaser. Long battery life, easy and secure.<br> Powered by 1 * CR2030 battery (included).<br> <br> <strong>Features:</strong><br> 4 super bright LEDs.<br> 7 flash modes.<br> Long run time.<br> Tool free installation.<br> <br> <strong>Specifications:</strong><br> QTY of LED: 4<br> Battery Life: 120-150h<br> Color: Red<br> Material: ABS<br> Seatpost Size: 23-30mm<br> Brightness: 10-15LM<br> NW: 42.5g / 1.48oz<br> GW: 50.8g / 1.79oz<br> Dimension: 70 * 34 * 26mm / 2.75 * 1.34 * 0.7in<br> Package Dimension: 85 * 60 * 45mm / 3.35 * 2.36 * 1.02in<br> Battery: CR2030 * 1 (included and replaceable)<br> <br> <strong>Package List:</strong><br> 1 * Bicycle Light <br> 1 * Seatpost Clamp<br> 1 * Spare Adaptor