BTR-1000 Bluetooth coffee refractometer is a professional digital tester specially designed for baristas to detect coffee TDS and Brix value for accurate extraction calculation. Built-in ATC automatic temperature compensation eliminates temperature interference and delivers stable, precise readings within seconds. Low-energy Bluetooth module connects to mobile APP for real-time data sync, mass brew record storage, extraction ratio analysis and data export, convenient for café batch management. Clear backlit LCD screen displays TDS, Brix and sample temperature simultaneously, one-key zero calibration for simple daily operation. High wear-resistant optical prism and ergonomic handheld body support long-hour testing in coffee shops and roasteries. USB rechargeable with auto power-off to save power. It helps baristas avoid over/under-extraction for consistent coffee flavor. Cost-effective wholesale price, essential testing equipment for coffee equipment distributors worldwide.