20pcs DS1900A iButton I-Button electronic key IB TM Watch Card Fobs w/ Bracelets

Product Description

Please tell me the color of Wristbands/Bracelets you prefer after

make the order!

IButton TM

watch card is a convenient and durable for intelligent TM worn on the wrist above the shaped card varieties.

It may also be used for access control, club members and staff management sign, sauna club membership card.

Features:

• Shockproof
• waterproof
• resistant to high temperatures
• closed-loop wrist strap
• flexible
• easy to wear
• easy to use.

Application:

• Library
• Swimming pool
• Sauna
• Outdoor work
• Bath center
• Humid working environment, etc.

Key indicators:

• ultrasonic encapsulation chip and coil
• Material:ABS/PVC
• Protection Class: IP67
• Suitable temperature: -25 to 70 ° C
• Package：20pcs