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

KGG LT21 4G Kids GPS Smart Watch – Stay Connected, Stay Safe

Give your child the freedom to explore while keeping you firmly in the loop. The KGG LT21 4G Kids Smart Watch combines real-time GPS tracking, two-way video calling, an SOS emergency button, and a built-in camera — all on your child's wrist. Whether they're at school, at the park, or a friend's house, you'll always know where they are and be just one tap away.

Made in Mainland China.

2026 Updated Version — What's New

• Upgraded memory: 1 GB RAM + 8 GB ROM
• New SMS messaging function
• New WhatsApp support for instant family communication

Key Features

• Triple-layer positioning: GPS + Wi-Fi + LBS for precise, real-time location tracking via the Setracker app
• 4G Video & Voice Calls: VOLET video calling, standard voice calls, and WeChat video support — always reachable
• SOS Emergency Button: One press instantly alerts preset parent contacts
• Remote Monitoring: Listen-in and remote camera features let parents check in discreetly
• 1.4-inch IPS Touch Screen: Vibrant 240×240 HD display; drop-resistant, scratch-resistant, dustproof, and splash-resistant
• IP67 Life Waterproof: Handles splashes and light rain; built-in Sonar drainage function to expel water quickly (not suitable for swimming, hot showers, or diving)
• 0.3 MP Built-in Camera: Kids can capture everyday moments right from their wrist
• Food-Grade Silicone Strap: Anti-static, sweat-proof, and gentle on young skin
• Pedometer / Step Tracker: Encourages active, healthy daily movement
• Wide Network Compatibility: 2G GSM B2/3/5/8 | 3G WCDMA B1/2/5/8 | 4G FDD-LTE B1/2/3/4/5/7/8/12/20/28A — works globally (SIM card not included; requires a local 4G data SIM)
• 20+ Languages Supported: English, Spanish, French, German, Italian, Russian, Arabic, Portuguese, Turkish, Dutch, Hebrew, Indonesian, Ukrainian, Polish, and more
• Global Version: Compatible with any country outside Mainland China with a supported 4G SIM
• MediaTek MT8521E Processor for smooth, reliable performance
• 650 mAh Lithium Battery — use 5V/2A adapter for charging

In the Box

• 1× KGG LT21 Kids Smart Phone Watch (SIM card not included)
• 1× USB Charging Cable
• 1× English Instruction Manual
• 1× Original Box

Important Notes Before You Start

1. Purchase a local 4G SIM from a main carrier and ensure a data plan is active.
2. Power off the watch before inserting the SIM; remove any SIM PIN code first.
3. Use a 5V/2A adapter to charge. A brief delay before the charge indicator appears is normal.
4. The international version does not include a weather function.
5. IP67 rating covers everyday splashes — avoid hot water, saltwater, swimming, or diving.
6. After water exposure, use the built-in Sonar drainage function to clear moisture.

Tech Specs at a Glance

For guidance on keeping children safe online and managing screen time, visit the FTC's Children's Online Privacy resource.

Frequently Asked Questions

Q: Does the KGG LT21 kids GPS smart watch work in my country?

A: Yes — it's a global version compatible with any country outside Mainland China, provided you use a local 4G SIM card with an active data plan. Check that your carrier supports the watch's LTE bands (B1/2/3/4/5/7/8/12/20/28A or B1/3/5/7/8/38/39/40/41) for full 4G speed.

Q: Which app do I use to track my child's location?

A: The watch pairs with the Setracker app, available for both iOS and Android smartphones. Once set up, parents can view real-time GPS + Wi-Fi + LBS location, make video or voice calls, and receive SOS alerts directly in the app.

Q: Is the LT21 kids smart watch truly waterproof?

A: The watch carries an IP67 life waterproof rating, meaning it can handle accidental splashes and brief water contact. It is not rated for swimming, diving, hot showers, or saltwater exposure. After any water contact, activate the built-in Sonar drainage function to remove moisture from the speaker.

Q: Can my child make video calls from the watch?

A: Absolutely. The LT21 supports 4G VOLET video calls, standard voice calls, and WeChat video calls. With the 2026 update, it also supports WhatsApp and SMS, so staying in touch has never been easier.

Q: What SIM card does the LT21 kids smartwatch need?

A: The watch requires a nano SIM card from a local GSM carrier with 4G/LTE service and an active data plan. SIM card is not included. Remove any PIN lock from the SIM before inserting it, and insert the card only while the watch is powered off.