LT21 4G Kids Smart Watch – GPS Tracker, Video Call & SOS

LT21 4G Kids Smart Watch – GPS Tracker, Video Call, SOS & WiFi

Give your child independence while keeping them connected and safe. The LT21 4G Kids Smart Watch combines real-time GPS location tracking, two-way video calling, SOS emergency alerts, and a built-in camera — all wrapped in a durable, kid-friendly design. Whether they're at school, a friend's house, or out exploring, you'll always know where they are and be just a tap away.

Made in Mainland China.

What's New in the 2026 Update

• Upgraded memory: 1GB RAM + 8GB ROM for faster, smoother performance
• Added SMS messaging so kids can send and receive text messages
• Added WhatsApp support for easy family communication

Key Features

• 4G Network Connectivity: Supports 4G LTE, 3G WCDMA, and 2G GSM bands for global compatibility (SIM card required, sold separately)
• Triple Positioning: GPS + WiFi + LBS location tracking for accurate, real-time location updates via the Setracker app
• Video & Voice Calling: Make and receive HD video calls and voice calls directly from the watch — including WeChat and WhatsApp support
• SOS Emergency Button: One press sends an instant alert with location to pre-set parent contacts
• Remote Monitoring: Parents can remotely check surroundings through the watch's built-in camera via the app
• 1.4" HD IPS Touch Screen: Crisp 240×240 resolution, scratch-resistant, and drop-resistant for everyday kid use
• Pedometer / Step Tracker: Encourages kids to stay active with a built-in step counter
• IP67 Life Waterproof: Splash and rain resistant — withstands everyday water exposure (not suitable for swimming, diving, or hot/salt water)
• Sonar Drainage Function: Built-in speaker vibration helps expel water after splashes
• Food-Grade Silicone Strap: Soft, anti-static, sweat-proof, and comfortable for all-day wear
• Multi-Language Support: English, Spanish, French, German, Italian, Russian, Arabic, Portuguese, Polish, Dutch, Turkish, Ukrainian, Hebrew, Indonesian, Chinese, and more
• Global Version: Works in most countries outside of Mainland China with a compatible 4G SIM card
• MediaTek 8521E Processor with 650mAh lithium battery
• Alarm Clock, Lighting, and Calendar functions included

Technical Specifications

What's in the Box

• 1× LT21 Kids Smart Phone Watch
• 1× USB Charging Cable
• 1× English Instruction Manual
• 1× Original Box

Note: SIM card is NOT included. Please purchase a compatible 4G SIM card locally. Disable any SIM PIN before inserting. Use a 5V/2A adapter for charging.

Important Usage Notes

• This watch is IP67 life waterproof — suitable for rain and splashes but NOT for swimming, bathing, diving, or hot/salt water.
• Use the built-in Sonar drainage feature to clear water after any exposure.
• Weather function is not available on the international version.
• Compatible in most countries outside Mainland China — select the correct server region in the Setracker app upon setup.

For more information on children's digital safety and healthy screen time guidelines, visit the CDC Child Development resources.

Frequently Asked Questions

Q: Does the LT21 4G Kids Smart Watch work with any SIM card?

A: The LT21 kids smartwatch requires a nano SIM card that supports 4G LTE data. It is a global version compatible with most countries outside Mainland China. Purchase a 4G SIM card from your local carrier, ensure mobile data is activated, and disable any SIM PIN before inserting it. Select the correct server region in the Setracker app during setup.

Q: How does the GPS tracker work on this kids smartwatch?

A: The LT21 uses a triple-positioning system combining GPS satellites, WiFi network location, and LBS (cell tower triangulation) to provide accurate, real-time location updates. Parents can view their child's location at any time through the free Setracker app on their smartphone.

Q: Can parents monitor the watch remotely?

A: Yes. Through the Setracker app, parents can initiate a remote monitoring session that activates the watch's built-in camera and microphone, allowing you to check your child's surroundings discreetly. The SOS button on the watch also sends an instant location alert to designated contacts.

Q: Is the LT21 kids smartwatch waterproof?

A: The LT21 carries an IP67 waterproof rating, which means it is resistant to splashes, rain, and brief water contact during everyday activities. It is not designed for swimming, diving, bathing, or exposure to hot or salt water. After any water contact, use the watch's built-in Sonar drainage function to help expel moisture.

Q: What video call and messaging apps does this watch support?

A: The LT21 kids smartwatch supports two-way video and voice calls through its native dialer and via WeChat and WhatsApp. The updated 2026 version also adds SMS text messaging, making it easy for children to stay in touch with family members.