The Green Lion Wallet Mate is a slim and sturdy tracking device that keeps your wallet safe. If you ever misplace it, you can easily ring the device from your smartphone. It also supports NFC for quick actions, and it's MFI certified for reliability. With a standby battery life of 2 years, you can count on it to protect your wallet for a long time. Keep your wallet secure with the Green Lion Wallet Mate. Specification Battery Life: 2 Years (Standby) Transmitter Frequency: 2.400 ~ 2.4835 GHz Receiver Frequency: 2.400 ~ 2.4835 GHz Material: Aluminum Frame + Glass Transmission Power: 4dBm Receiving Sensitivity: -93dBm Battery: Primary Lithium, 540mAh Features Thin & Durable Ring The Device NFC Support MFI Certified