1. Voice call-back, dual microphone, voice IC independent control, high sensitivity. 2. Positioning platform for life Free platform fee, time purchase, lifetime use someone to Maintain and upgrade the database in a timely manner. 3. Dual-platform location-based services, according to the regional differences, select the appropriate platform. From worries. 4. The independent custom made high-capacity polymer battery, not callback about 5 days standby, open callback the next 2-3 days. 5. Follow-up software escalating, more humane requirements, more cost-effective.
