Specification:

LED:  CREE
Battery:  1*AA/1*14500
Max Output: 630 lumen
Max Runtime:  1h 25min
Switch & mode: head rotary switch 1 general mode
Waterproof: Underwater 150m (500 feet)
Size&N.W: 92mm(L)* 20mm(D)* 24mm(H)/47.5g

Features: 
1. Can be easily attached on a dive mask with MX05 mask mount. 
2. Mechanically head rotary switch offers high reliability. 
3. Reverse polarity protection Accessories: 2*AA batteries, MX05 mask mount, O- ring, lanyard