High-Strung High-Strung box includes a set of string, digital tuner, and many more. Here’s the December 2018 review of the subscription for guitar enthusiasts + coupon! Subscription Box Reviews December 2018 Monthly Subscription Boxes / Subscription Box Reviews / High-Strung Subscription Reviews / Crafts, DIY, & Hobby Subscription Box Reviews / Miscellaneous Subscription Box Reviews / High-Strung Subscription