Features: Perfect Compatibility --- Replacement Charger Cable Only for Spade Health Smartwatch 4, Spade Health Smartwatch 3 Smartwatch(not for Spade's Health Smartwatch 2). Gives you a faster charging speed:) Durable & Safe --- Over-current,over-voltage,short circuit,and over-temperature protection chip included, provides you a safe environment for charging, premium material have a longer service life,flexible and durable. Upgraded Strong Magnet --- After market research, we have made key upgrades for the magnetic suction part to ensure strong enough suction. Compact & Portable --- The magnetic charger has a lightweight and slim design, it fits even in your smaller pocket. whether at home or traveling, be your nice on-the-go companion. Replacement Charger for Spade Health Smartwatch 3 & Spade Health Smartwatch 4 Smartwatch(not for Spade's Health Smartwatch 2) Specification: Input: 5V/0.5-1A Power Protection: Yes Highlights: FAST CHAEGE & STABLE PERFORMANCE OVER-VOLTAGE & OVER-CURRENT PROTECTION Tips to help you protect your smart watch better: *Using the charging cable with built-in chip, can effectively prolong the service life of watch. *Limit recharging time to 80 minutes is appropriate. *Charging your watch before the battery runs down. *Don't use the cell phone charger, please connected to USB Power Source on PC, Mac, Laptop or Notebook for more stable voltage.