Supplied with 3 x AAA batteries & 2 x CR2032 batteries (for the Carabiner light), Bright 160 Lumen pen-light output COB (chip on board). 3W (160 Lumen) Pen / Worklight features a powerful magnetic base for easy attachment & a clip for belt or pocket. Measures approx. 17.5cm in length x 2.8cm width x 1.6cm in depth. Both units have their own features & uses & are great for inspection work & ideal for working in dark spaces & corners, in the garage, at home, in the car & for emergency roadside uses, camping, fishing & much more... Handy & compact 1W Carabiner Clip unit features LED COB technology with 3 Light settings including a strobe/flashing mode.