Sheena Vasani writes about tech news, reviews gadgets, and helps readers save money by highlighting deals and product recommendations for The Verge . If you’re planning to travel this summer, both a Bluetooth tracker and a personal safety device can come in handy, especially if you’ll be exploring on your own. The Pebblebee Halo combines those two gadgets into one, and it’s currently on sale for $49.99 ($10 off) at Amazon , which is the best price we’ve seen. Amazon is also throwing in a fourth Halo for free when you buy three as a part of a limited time promotion . Whether you’re touring a new city or heading back to your hotel after a night out, the Halo can help in a variety of situations. Like the Pebblebee Clip 5 — our favorite AirTag and Tile alternative — the rechargeable, water-resistant tracker does a good job of accurately helping you keep tabs of bags, wallets, keys, and other valuables.…