R4 Smart Ring Health Fitness NFC Waterproof Ring Smart

• Type: Bluetooth Bracelet, Smart Card
• Distance version: Class A
• Usage: Communication
• Material: Plastic
• Feature: Bluetooth
• Read-Write Method: Contact Type
• Model NO.: R4
• Label Category: Passive
• Structure: Read-Write Card
• Application Field: Market
• Power Supply Mode: Active Card
• Frequency: High Frequency
• Data Transmission Mode: Serial
• OEM: Support
• Fast Delivery: Support
• Sample Order: Accept
• MOQ: 100PCS
• Transport Package: Cartton Box
• Specification: 5.8cm * 5.8cm * 4.5cm
• Trademark: MB
• Origin: China
• Production Capacity: 2000/Day

Product Description

Micro-crystal Zr ceramics 
R4 whole body is entirely made of micro-crystal Zr ceramics.
With excellent refractive index and chromatic dispersion, the device emits unique rounded luster.