Intova Strobe ISS 4000:

Sleek and powerful, the ISS 4000 provides great strobe performance in a compact size.  4 preflash settings allow the ISS 4000 to work with virtually all cameras. The power knob  adjusts anywhere between 10-100% for precise output power. Recycling time between flashes is blazing quick and the diffuser is now included with strobe.

Specifications:
- Powerful 42 Watt-second flash-tube, generating a guide number of 20m (ISO 100) in air
- Color temperature of 5700 deg Kelvin
- with 4 pre-flash settings
- Continuous brightness control from 10% to full-power
- Operates on 4 x AA batteries, approx 240 flashes at full power
- Fast recycle time (almost instantaneous for brightness 50% or less)
- Slave sensor with receptacle for standard 7mm optical fiber adapter
- Beam angle about 80 degrees horizontal, Diffuser included for close-ups
- Depth rated to 180 feet/55m
- Weight: 1 lb 8 oz/0.68kg with batteries loaded
- Size: 6.5 in x 4.7 in x 4.9 in/165mm x 120mm x 125mm

BUY INTOVA PRODUCTS FROM AUTHORIZED DEALERS ONLY: To ensure proper warranty coverage, make sure Intova products are purchased from legitimate retailers only. Be sure that the dealer has a mailing address and provides a receipt that verifies: Dealer Name and Address. Customer Name and Address. Date of Purchase. Complete Description and Cost of items purchased. Receipt must be presented for warranty service.