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🌞Product Features: 💌Three-color indicator light:Know the status of the patrol at any time 💌Magnetic interface:Strong magnetic adsorption is not easy to fall off, two-in-one charging and communication 💌Card reader:Automatic card reading at a distance of 3-5cm from the inspection point 💌Non-slip leather case:Anti-slip anti-fall shockproof silicone protective case 💌Long standby time:29 days of continuous use on a two-hour charge 🌞Product Specification: 💌Color:blue gray 💌Size:144*47*30mm 💌IP rating:IP67 💌Operating temperature:-40℃~+85℃ 💌Card reading method:inductive RFID 125KHz 💌Card reading distance:3-5cm 💌Communication method:upload 15000 pieces of data per minute 💌Battery:nominal voltage 3.7V, rated capacity 880mAh 💌Standby time:500 card readings a day can be used continuously for more than 29 days 💌Data storage:60000 💌Status prompt:Vibration with colorful LED lights