The TLR-7 X  can accept either Streamlight's SL-B9 USB rechargeable protected lithium-ion battery pack or a CR123A lithium battery. Interchangeable rear paddle switches to suit your shooting style
 
Rail clamp system securely attaches/detaches quickly and safely with no tools and fits a wide range of guns.
 
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Specifications:
High Lumens: 500
Run Time: 1.5 hrs
Beam Distance: 14 m
Max Candela: 5,000
Battery Type: Streamlight SL-B9 Protected Li-Ion USB Rechargeable Battery Pack (optional), CR123A Lithium
Battery Quantity: 1
Length: 2.58 in
Weight: 2.48 oz
Colors: Black