Product information: Product material: stainless steel, silicone, acrylic Battery: 3.7V 75mAh Input voltage: 4.2V Output voltage: 3V Product size: 20*230*10mm (hand ring) 26*41*10mm (hanging buckle)<img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/1614501038541.jpg" style="max-width:100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/1614501038549.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/1614501038545.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/1614501038539.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/1614501038550.jpg" style="max-width: 100%;"><img src="https://cc-west-usa.oss-accelerate.aliyuncs.com/1614501038547.jpg" style="max-width: 100%;">

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