ZDNET's John Sutter has found a new favorite AirTag alternative, the UAG Metropolis by Urban Armor Gear, which is designed to fit into a wallet or purse. The lightweight tag is lightweight, measuring 3.4 x 2.2 x 0.1 inches (85.8 × 53.6 × 3.0 mm), making it about the thickness of four credit cards. The Metropolis also offers a 130dB siren and strobe light. The battery can last through 300 recharge cycles, equating to over 100 years of use. The device also has a slot for luggage and a rechargeable rechargeable battery. Sutter's review also highlights the value of RFID-blocking wallets for tracker cards.