Marketplaces list two very different products under “farm box”. Confirm which you need before purchase — specs and pricing are on our shop.
| Type | What you get | Typical use |
|---|---|---|
| Empty USB / OTG box | Ports + power only; you supply full phones | DIY with used handsets |
| Integrated motherboard chassis | Android boards + central control inside metal case | Rack deployment, fleet software, B2B |
Empty box trade-offs
- Lower entry price for the shell only
- You still buy 20 phones, cables, charging, and maintenance
- SMS OTP usually requires a separate verification vendor
Integrated chassis trade-offs
- No batteries; better density and cooling than desks of phones
- USB + LAN to one PC; batch APK and monitoring
- Huicheng adds real global SIM OTP on the same site — fewer vendors to integrate
Huicheng standard unit (reference)
Integrated 20-board chassis · USB + LAN · industrial cooling · group-control software from official site. Full parameters: manufacturer page.