We require modified DC UPS modules for integration into smart prepaid electricity meters. The solution must be based on existing power bank/UPS designs with minimal adjustments to input/output interfaces and voltage configurations.

Key specifications:
- Input: 12V DC external supply
- Output: Stable 5V DC with 5A continuous current
- Capacity comparable to standard compact power banks
- Unit cost target: USD 3-8

No new product development required. Priority given to suppliers who can implement simple interface connector modifications while maintaining cost efficiency.

I need an MP3 speaker module meeting these specifications:
- Power input: USB 5V (Micro-USB/Type-C)
- Media input: TF card or USB drive compatibility
- Auto-play function upon power activation
- Physical controls: Rocker power switch + volume knob
- 2W mono or 2×3W stereo amplifier
- Integrated speaker required
- Basic plastic enclosure (no custom molds)

Additional requirements:
- Immediate playback when connected to power with switch ON

Please provide:
1. Sample cost with shipping
2. Unit price for 100pcs MOQ
3. Lead time for samples and bulk production

We need sound modules with USB interface for musical greeting cards that can store 1-minute audio recordings. The module must support self-recording functionality and provide high sound quality. Require testing samples first to verify recording capability and audio clarity before bulk ordering. Initial order quantity will be 500-1000 units. Please recommend compatible products meeting these specifications.

We are seeking USB sound modules specifically designed for musical greeting cards. Key requirements include:
- Approximately 1-minute recording duration capacity
- High-quality audio output capabilities
- USB interface for self-recording functionality

Initial requirement:
1. Sample testing for quality verification
2. Followed by bulk order placement upon successful evaluation

Please provide:
1. Technical specifications
2. MOQ for sample and bulk orders
3. Unit pricing structure
4. Production lead time

Product Required:  
- Laser Distance Meter  
- Laser Rangefinder Sensor Module  
- OEM Part No.: SW-LDS50A  

Specifications:  
? RS485 communication interface  
? 50 meters measurement range  
? 12VDC power supply  

Quantity:  
? 1 piece (sample order)  

Additional Requirements:  
? Prefer OEM/ODM service providers  
? Please provide technical specifications sheet  
? Include lead time for sample production  

This is an initial inquiry for product testing and evaluation. Suppliers with expertise in laser measurement instruments are preferred.

Inquiry about OEM laser EDM (Electronic Distance Measurement) module suitable for integration into a new total station instrument. 

Measurement type: Laser distance measurement (reflectorless and with prism) Reflectorless range: 200–500 meters (minimum) Accuracy: ±2 mm   2 ppm (or better) Interface: Preferably digital (RS232, USB, or similar) Power supply: Please specify voltage and consumption

We require a compact PCB suitable for GPS tracking applications with the following key components: Microcontroller: ESP32 module GPS Module: Integrated GPS receiver Cellular Module: SIM800L (for GSM/GPRS connectivity) Power Supply: External battery interface (Li-ion or similar) Information Requested 1. Manufacturing

i want to buy seven time attendance machines
Finger Print Attendance Machine Technical Requirement Finger Print Attendance Machine Attendance Machine Specification Display(4.3" TFT Touch Screen) Face Capacity(3,000 (1:N) Fingerprint Capacity(2,000) ID Card Capacity(10,000 (Optional) Logs Capacity(100,000) Communication(TCP/IP, RS232/485, USB Host) Time Attendance Standard Functions Automatic Status Switch, Self-Service Query, Work Code, T9 Input, 9 Digit User ID, DST, Scheduled-Bell, Photo-ID, Multiple Verify Mode Access Control Interfaces for 3rd Party Electric Lock, Door Sensor, Exit Button, Alarm Wiegand Signal(Output) Optional functions (2000mAh Backup Battery, ID Card, Mifare card, ADMS, Wi-Fi, GPRS/3G) Power supply(DC 12V 3A) Verification Speed(≤1 sec) Operating temp.(0 °C- 45 °C) Operating Humidity(20%-80%) Dimension(194.1×169×109.0 mm) Network Support( Yes) System Configuration(Yes) Training for 10 ICT Experts(Yes) Warranty(2years)

hello do you have (Open Channel Ultrasonic Flow meter) Ultrasonic Flow Meter TUF2000B Liquid FlowMeter TUF-2000B 50-700mm TM-1 with as specification as below : a) Accuracy 1% b) Velocity range 0~10m/s, Bi-directional measurement c) Pipe size DN32~DN6000mm d) Temperature -30~160 e) Type of liquid Single liquid can transmit ultrasound, such as water, sea water, sewage, oil, alcohol, etc. Pipe material Steel, stainless steel, cast iron, copper, PVC, aluminmum, glass steel, etc. Liner is allowed. Signal output 1 way 4-20mA output 1 way OCT pulse output 1 way Relay output Signal input 3 way 4-20mA input, achieve to heat measurement by connecting PT100 platinum resistor. Interface RS485, support MODBUS Data storage SD card regularly store the pre-set results(optional) Power supply DC8~36V or AC85~264V