GY-521 MPU-6050 sensor contains a MEMS accelerometer and a MEMS gyro in a single chip. It is very accurate, since it contains 16-bits analog to digital conversion hardware for each channel. Therefor it captures the x, y, and z channel at the same time. The MPU-6050 is not expensive, since it combines both an accelerometer and a gyro.

Specifications:

- Power supply: 3~5V
- Communication mode: standard IIC communication protocol
- Chip built-in 16bit AD converter, 16bit data output
- Gyroscopes range: +/- 250 500 1000 2000 degree/sec
- Acceleration range: +/- 2g, +/- 4g, +/- 8g, +/- 16g
- Immersion Gold plating PCB, machine welding process to ensure quality
- Pin pitch: 2.54mm

Dimensions: 0.79 in x 0.59 in x 0.12 in (2.0 cm x 1.5 cm x 0.3 cm)
Weight: 0.18 oz (5 g)