Green Convenience Christmas Lights 33ft 100 LED Battery String Lights with Timer Memory Function USB or Battery Powered Waterproof String Lights for Indoor Outdoor Decoration (Multi-Colored) Mysense Part Number: 768443533492

Part Number: 768443533492

B26FT70SNS

You can also measure using a jeweler's ring sizer placed around the joint you are treating or with the Oval-8 Sizing Guide

About biconvex lens: if an object is placed at a distance > 2X focal length

Green Convenience Christmas Lights 33ft 100 LED Battery String Lights with Timer Memory Function USB or Battery Powered Waterproof String Lights for Indoor Outdoor Decoration (Multi-Colored) Mysense Part Number: 768443533492Brand: Green Convenience Color: Multicolor Features: 8 Modes Memory Function: Press The Button To Select The Mode: Combination,In Wave,Sequential,Slo Glo,Chasing Flash,Slow Fade,Twinkle Flash,Steady On. Timer Memory Function Will Be Activated As You Turn The String Lights On Indoor Outdoor Christmas Lights: Our Christmas String Lights,2in1 Powered Style,Support USB Or Battery Powered. No Wiring Required,Easy To Put Or Hung On