Product Advantages
No-Screen Safe Communication for Kids & Home
The Kaer KS21-A Kids WIFI Phone is a professional kids SIP phone and home use IP Phone independently developed with full intellectual property rights. It uses home network to realize stable voice calls without a SIM card or traditional telephone line, creating a safe, screen-free, and disturbance-free communication environment specially for children, the elderly, and home offices.
Dual-Band WiFi & Wired LAN for Stable Connection
This device supports both wireless and wired network access to ensure all-scenario stability.
Dual‑band WiFi: 2.4GHz + 5GHz
WiFi protocol: 802.11b/g/n/ac/ax
Optional wired LAN port for reliable office & home use
Automatic network switching for low interference & smooth calls
Full home coverage without disconnection
HD Voice & Professional Audio Performance
Equipped with high-fidelity voice processing for clear and natural calls.
Supports HD voice call
Multiple codecs: G.711, G.722, G.729, AMR-NB/WB, iLBC, Opus
Built-in AEC (automatic echo cancellation)
Noise reduction & gain control for home environments
Loud and clear ringtone & hands-free audio
Easy Deployment & Web Management
Zero technical threshold for parents, administrators, and home users.
Fast setup in minutes without APP or software
Web-based management via phone / PC browser
Configure SIP account, network, volume, ringtone, and permissions
Intuitive interface suitable for all ages
Ideal for home, rental, office, hotel, and education scenarios
High Compatibility with Global SIP Systems
Fully compatible with mainstream communication platforms for home & business use.
Supports standard SIP v1 / v2 (RFC2543 / RFC3261)
Compatible with IP PBX, softswitch, IMS, cloud telephone systems
NAT traversal: STUN, TURN, ICE
Supports RTP/RTCP/SRTP, QoS, IPv4/IPv6
Smooth integration for home, enterprise, hotel, and global projects
OTA Remote Upgrade & Long-Term Stability
Always improving without disassembly or return.
Supports OTA remote firmware upgrade
Auto-detect updates or manual upgrade
Optimize call quality, stability, and functions continuously
Safe rollback if upgrade interrupted
Maintain high performance for years of use
Safe, Durable & User-Friendly Design
Made for daily use by kids, seniors, and families.
Material: ABS + TPU composite, lightweight, drop-resistant, wear-proof
Compact minimalist style blends into home decor
Large standard keypad
Ergonomic handset for comfortable grip
Stable base for desktop placement
No screen, no games, no social media, no addiction
Wide Power Compatibility for Global Use
Stable power supply for home and international markets.
Input: AC 100–240V wide voltage
Output: DC 5V/1A
Reliable for 24-hour standby
Works in most countries and regions
Ideal For
Kids safe home communication tool
Family landline replacement without wiring
Elderly friendly simple telephone
Home office & small business IP phone
Rental apartment, hotel, guesthouse voice device
Education center & nursery communication equipment
Why Choose Kaer KS21-A Kids WIFI Phone?
✔ No screen, no entertainment, no internet addiction
✔ Dual-band WiFi + wired LAN for ultra stability
✔ HD voice with echo cancellation & noise reduction
✔ Web management, easy setup for all ages
✔ Full SIP compatibility for home & business
✔ OTA upgrade for long service life
✔ Safe, drop-resistant, eco-friendly material
✔ Supports customization, ODM / OEM for global partners
✔ Professional SaaS hardware provider with stable supply
