We require development of battery-powered hookah bowl heater prototypes to replace charcoal usage. Essential features include:
1. Compact design for bowl-top placement
2. Rechargeable lithium battery system
3. Temperature-controlled heating element (ceramic/PTC preferred)
4. Integrated heat sensor for precise regulation
5. Safety mechanisms against overheating

Seeking manufacturer capable of prototype development (1-2 units) with ODM/OEM services. Must provide NDA agreement before technical discussions. Requirement includes USB-C charging port and LED status indicators. Please confirm production feasibility and provide preliminary cost estimates.

We are seeking compact PC systems with three specific configurations for product development evaluation.

Variation 1 requires:
- Wi-Fi/Bluetooth enabled small PC
- 3-3.5" touch screen with HDMI input/output
- Integrated speaker and cooling solution
- USB-C rechargeable battery power station

Variation 2 requires:
- 5" touch screen model with enhanced cooling system
- Temperature control maintaining 5-16°C
- Integrated QR/barcode scanner
- Standard AC power operation

All units must support cloud-based video streaming via HDMI. Please provide technical specifications and development cost estimates for these configurations.