How to choose model B003A's Av Output? PAL or NTSC?

Supereyes B003A is an AV output product. Most clients does not know which system they should choose when purchasing. Following information might be helpful. 

Phase Alternating Line (PAL) is a colour encoding system for analogue television used in broadcast television systems in most countries broadcasting at 625-line / 50 field (25 frame) per second (576i). Other common colour encoding systems are NTSC and SECAM.*

NTSC, named after the National Television System Committee, is the analog television system that is used in North America, and until digital conversion was used in most of the Americas (except Brazil, Argentina, Paraguay, Uruguay, and French Guiana); Myanmar; South Korea; Taiwan; Philippines, Japan; and some Pacific island nations and territories. **

For detailed country list. Please refer to http://www.annenuotio.net/dvd/ntsc_pal.pdf

* https://en.wikipedia.org/wiki/PAL
**https://en.wikipedia.org/wiki/NTSC