Acetech AC6000 Standard & AC6000BT Bluetooth Chronograph Manufacturer: Acetech Specifications: Manufacturer: AceTech Product Construction: Polymer Muzzle Speed Measurement Range: 98.43 - 1312.34 (FPS) Burst Speed Measurement Range: 100 - 5000 Rounds/Minute Battery: 1x 18650 Lithium battery (Included w/ micro USB cable for charging) Muzzle speed measurement range: 30.00 ~ 400.0 m/s Burst speed measurement range: 100 ~ 5000 rounds/minute Camera tripod screw hole for fixing to camera tripod Bluetooth model compatible with AceSoft Bluetooth App for all controls and programming, App available for free on Google Play Store and Apple App Store 25 shot memory slots for velocity and ROD (Rate of Fire) User-friendly interface with 128x128 pixel OLED in white color Auto-calculate MAX, MIN, AVG by shot memory Size: 130mm x 108mm x 61mm housing, 36mm measuring tube diameter Weight: 12oz Compatibility: All BBs Material: Polymer Package Includes: 1 Chronograph, 1 charger cable