• The above unit price is the large size whistle unit price, there are a lot of spot, the need of the customer can be directly photographed
• If necessary, please contact the seller directly
• According to customer needs for LOGO printing and customized
• Item no: 12 mm * 62 mm
• Color: purple Red black green rose-red sky blue silver gold 
• Product features: short tone (within one second); ■ long notes (more than 3 seconds); Instructions within the whistle interval of 2 ~ 3 seconds, the interval between the above 30 seconds (such as repeat send instruction to interval of more than 30 seconds) communication (T) : s s s (a long) used for voice communications, to determine each other whistle bearing, after receiving the whistle commands issued on behalf of the received instructions (similar to propaganda hello ~ ~ ~ ~ ~) collection (U) : * * s s s two short (a long) to whistle in the direction of the collection (similar with propaganda collection ~ ~ ~ ~) forward (V) : low s s s (one? Peach wye ぃ? On behalf of the team set off during a break, a representative in walking speed up (with propaganda! ~ ~ ~ ~) before the team waiting for (W) : low S S S S S S (a short two long) when used for long distance and procession, required before the team after waiting for team (with answers please wait ~ ~ ~ ~ ~ ~ ~) require support (S) : low low low short (3) when in trouble need to seek help, who received signal (T) in a communication voice reply said will travel to support (with propaganda urgent! Be urgent! Be urgent! ●● ● (three short three long three short) this is an international SOS code, please remember
• We can choose express delivery when we receive the postage, and contact customer service for other information

This product is in bulk, you can take the card on the card