Package include: 1 x oximeter(No Battery) 1 x lanyard 1 x instruction manual 1. OLED HD display: Adopt LED high-definition display, can clearly display the pulserate waveform, Multi direction and large screen display, humanized detail design, easy to read. 2. Small and light: Small in size and light in weight, one-key measurement, Simple and stylish appearance, round feel, blood oxygendetection anytim and anywhere. 3. Infrared detection: accurate and fastAcceleration sensor, speed measurement. Description: 1. Soft Hypoallergenic Medical Grade Silicone Finger Chamber. Specifications: Material: ABS Product Name: Pulse Oximeter Product Size: 5.8*3.2*3.2 CM Display screen: two-color OLED Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.