3 tracer units and some BBs.

1.Acetech Predator MkIII  100
The Predator MKIII from Acetech is a 2-in-1 tracer unit that looks like a suppressor. This tracer illuminates green BBs during night games and produces a realistic muzzle flash with every shot. With the built-in Li-Ion battery, you can fire up to 20,000 illuminated BBs.

2.Acetech Lighter BT   80
Lighter BT can connect cell phone through Bluetooth and can perform the function of speedometer through AceSoft APP. 
Lighter BT supports green and red tracers.
For installation, the barrel cannot be too long. The barrel cannot exceed 12 mm from the foremost end of the thread. Otherwise, the barrel will block the infrared sensor of Lighter BT and BB tracers will not be induced.
Lighter BT should be installed on BB gun. By no means can your eyes directly look into the muzzle, to avoid accident due to erroneous operation or BB gun failure or erroneous shooting

Specifications:
*Support green and red tracers.
*Support 35PRS running fire speed.
*Built-in li-Poly battery with charge time of 2 hours
*Charging once can provide the shooting of 30000 tracers.
*LED power and electricity quantity display

3 The Smokey Wolf Pro   100
combines three functions in one unit: tracer illumination, muzzle flash, and smoke effects. With 14mm CCW threading, this tracer fits almost any airsoft replica. The four adjustable modes let you choose which effects to use during a skirmish.