Competition Electronics ProChrono DXL Ballistic Chronograph with built-in Bluetooth. The chronograph comes with a Competition Electronics ProChrono Carrying Case

Features:

On-board Bluetooth connectivity with FREE apps for iOS, Android, Kindle and PC.

Built in full featured operating system with multiple shot string memory and statistics

Sensing system compatible with a wide variety of light conditions and projectiles

Fast internal shot clock for accuracy to +/- .5% or better

Replaceable Alkaline 9-volt battery power (not included) for 20+ hours of operation

Specifications:

Brand: Competition Electronics
Model/Series: ProChrono DLX
Velocity Range: 20 – 9,999 feet per second
Temperature Range: 20-100 degrees Fahrenheit
Size: 16x4x3-1/4 inches
Weight: 2.1 lbs
Battery Required: One 9-volt alkaline battery
Battery Life: Approx. 20 hours of operation
Current Consumption: Approx. 20mA
Mounting Hole Thread: 1/4x20
Guide Wire Size: 3/16x16 inches
Memory Capacity: Up to 9 strings of up to 99 shots each
Minimum Time Between Shots: 500 mSec
Shot Timing Resolution: 31 nSec (8000 counts @ 4,000fps) Crystal Controlled
Accuracy: +/-.5% of measured velocity or better
Bluetooth: BT2 and BT4LE