1. Wide voltage operation: 3.3~5.5V 2. 0~2.3V analog signal output, compatible with 5V, 3.3V two control 3. The excitation source is an AC signal, effectively preventing probe polarization 4. Waterproof probe for long-term immersion in water 5. compatible, easy to connect, plug and play, no soldering required Input voltage: 3.3~5.5V Output signal: 0~2.3V Working current: 3~6mA TDS measurement range: 0~1000ppm TDS measurement accuracy: 10% F.S. (25Celsius) Module interface: XH2.54-3P Electrode interface: XH2.54-2P Number of probes: 2 Connection interface: XH2.54-2P Other: Waterproof probe Colour:Black+white Material:plastic Size:42x32mm Overall length: 83cm Package Contents: 1 x TDS signal adapter board 1 x Waterproof TDS probe 1 x Analog sensor line Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.