2X ELITECH RC-4 USB Temperature Data Logger Datalogger Recorder External Sensor 16000 Point

It has one CR 2450 battery, with the battery compartment in the back, ease of battery replacement: Rotate the battery cover clockwise to remove the battery by a coin, and rotate and tighten the battery cover counter after battery replacement. Specifications: Temperature measuring range: -30 C~+60 C for optional external sensor: -40 C~+85 C Ambient environmental temperature: -30 C~+60 C Accuracy: +/-1 C Resolution: 0.1 C Record capacity: 16000 points (MAX) Record interval: 10s~24hour adjustable Sensor: Internal NTC thermal resistor Communication interface: USB interface Power supply: CR2450 battery or power supply via USB interface Battery life: in normal temperature, if the record interval sets as 15 minutes, it could be used above one year. Item Size: approx. 84 (L) x 44 (W) x 20 (H) mm (3.3 x 1.73 x 0.79 inch) Item Weight: approx. 120 g Package: 2 x Data Logger 2 x CR2450 battery (Installed inside) 2 x External Sensor 2 x USB Cable 2 x Instruction Manual. Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.