匈牙利采购需求：心率监测器、智能手表、骑行传感器、智能跳绳、传感器数据接收器、体脂秤

We are currently assessing a device for potential integration into our fitness platform and need some clarifications on its capabilities. Specifically, we're interested in raw PPG and accelerometer data access, as well as the availability of beat-to-beat interval metrics and HRV calculations. Additionally, we'd like to know about the BLE services offered, whether an SDK is available, the feasibility of custom firmware, and the minimum order quantities for both firmware customization and private label options. Please also provide details on the BLE protocol documentation and if a sample unit can be arranged for evaluation.