Disassembly of the Xiaoxun D9 children's smartwatch revealed the presence of four duplexers from Newsonic Semiconductor, covering FDD-LTE bands. This suggests the achievement of replacing domestic radio frequency filters in the cost-sensitive wearable device segment.
Four Newsonic Semiconductor duplexers were found inside the Xiaoxun D9. They cover bands B1 and B5 using N-SAW technology, as well as bands B3 and B8 using TC-SAW technology. This fact marks an important milestone in the localization of the radio frequency front-end, as children's smartwatches belong to consumer electronic devices that are highly constrained in space and sensitive to price, where every component is carefully checked for its price-to-performance ratio.
The combination of N-SAW and TC-SAW technologies demonstrates a high level of engineering sophistication. Bands B3 and B8 are the most congested LTE bands, requiring temperature-compensated TC-SAW to ensure stable operation when heated by contact with the skin. Meanwhile, bands B1 and B5, which have a cleaner spectrum, allow for the use of less expensive N-SAW.
Children's smartwatches represent a unique product category in China. Unlike smartphones from Apple or TWS earbuds from AirPods, this segment has developed exclusively by Chinese companies, starting with an emphasis on safety, through support for 4G video calls and social ecosystems, up to the integration of modern artificial intelligence models. According to IDC data, the volume of wearable device shipments in China reached 18.14 million units in the first quarter of 2026, with children's watches accounting for 4.42 million units, showing a year-on-year growth of 22.4%. Online sales alone reached 11.224 million units in 2025 with revenue of 5.72 billion yuan, and the average selling price increased to 510 yuan, confirming the transition from basic calling terminals to highly integrated smart devices.
The radio frequency challenge in children's watches is extremely complex. The internal space is usually only one-tenth the size of a smartphone, yet it must simultaneously support LTE, GNSS, Wi-Fi, and Bluetooth. Video calls require low insertion loss and excellent out-of-band noise suppression from the filters. Multi-positioning, which requires the joint operation of GPS L1 with the 4G B1 uplink channel, creates risks of harmonic and intermodulation interference, demanding exceptional attenuation suppression. Newsonic Semiconductor offers full-range and full-cycle duplexers, including SAW, TC-SAW, TF-SAW, BAW, and IPD technologies, and has filed over 500 patents, 230+ of which have been approved in China and the United States.
The implications for the supply chain are significant. Newsonic components have entered the production processes of companies such as Xiaomi, Samsung, Honor, OPPO, vivo, and Motorola. Over 20 Newsonic filter models have been incorporated into the reference design platform of Unisoc 4G, marking the first instance of a Chinese radio filter supplier being included in the core reference design of a mobile platform, signifying a shift from passive substitution to active standard definition. Furthermore, Newsonic is the first domestic filter manufacturer to receive AEC-Q200 qualification for the automotive industry, confirming that its design, manufacturing, and quality control systems comply with top-tier international standards. For children's smartwatch brands entering foreign markets, Newsonic filters, which are not patent-dependent, eliminate intellectual property infringement risks that have long plagued the export of Chinese electronics. Four duplexers on a child's wrist represent a small but important step in the broader process of achieving self-sufficiency in the radio frequency front-end.
In the modern world, people have become very busy with technology. Work in many offices is now done using smartphones, and social networks are constantly used for entertainment and communication. However, sometimes parents continue to use phones even when spending time with their children. This habit can gradually create distance in the relationship between children and parents.
A study was conducted involving 284 children aged 10 to 15. Participants were surveyed about how often their parents use smartphones, what feelings they experience because of this, and how they behave. The goal was to understand the impact of parents' constant engagement with phones on children.
The study showed that when a child tries to talk to their parents, but the parents' attention is focused on the phone, the child may experience strong anger and sadness. They feel ignored. If this happens regularly, it can negatively affect the child's personality and cause negative emotions.
When parents are constantly occupied with their phone screen, the child, despite numerous attempts, may give up. They begin to feel that conversation is pointless. Gradually, they distance themselves from their parents, and the bond between them weakens.
In our time, people already have little time to spend with their children. If a child is talking and you are busy with your phone, the amount of personal interaction decreases, which can lead the child to feel emotionally lonely.
According to the study results, to maintain a good relationship with a child, healthy digital habits should be adopted. Do not use your phone while talking to your child or during meals. If you need to check your phone for an urgent reason, inform your child that you will finish the task and then talk calmly. This will help the child understand your position and strengthen the bond between parents and children.
