Requirement for compact eddy current-based gold testing device with the following specifications:
1. Portable form factor for jewelry karat and purity analysis
2. Communication interface (USB/UART/Bluetooth) for microcontroller connectivity (e.g. ESP32)
3. Real-time signal output and raw measurement data access
4. Technical documentation and calibration support
5. Custom data processing integration capability

Additional requirements:
- Product customization options
- Pricing details
- Delivery lead times
- Technical protocol specifications

Order quantity: TBD (multiple units planned after product verification)
Budget: Flexible based on technical compliance

Looking for suppliers of portable audio amplifier boards with the following features:
- Integrated Bluetooth connectivity
- USB and TF card playback capability
- Compact and portable design

Please provide:
1. Technical specifications
2. MOQ and pricing details
3. Lead time
4. Certifications (CE/RoHS if available)

Samples required before bulk order.

Inquiry About 112mm 12-35V Vehicle Truck Bluetooth Portable Mobile Thermal Printer VLTP-112

Looking to purchase 4 units of 26W Vibration Speaker Bluetooth Bass Portable Speakers Resonance1426

need description and price for GTS-1468 Mini Wireless Portable Bluetooth Speaker, GREATNICE GTS-1468 Bluetooth, USB, TF Card & FM Radio Supported Speaker With RGB Lightning Effects

Inquiry About Portable Bluetooth mobile Thermal Receipt Printer support android smartphone AB-320M

 I see that you carry portable CD players with bluetooth.  

Eyoyo Hot Sale Portable Mini Bluetooth USB 2D 1D Wired Wireless Barcode Scanner Barcode Reader for Pad Phone Android Tablet PC

Are these in stock ?

Hello, my company is interested in buying 3200 units of mini portable bluetooth speaker (FOB Budget: USD$ 1.50 - 2.00 per unit), please send me an email to give you details so you can send me an offer. Thank you.