c) Coulomb meter
Not only do coulomb meter accurately displays the capacity of battery charge with the way of real-time detection, it also can be shown by LED on a scale of 1 to 10 in red as well.
It typically adopts booting test mode, showing the 10th unit bar from the left if battery power is full, otherwise it will displays the scales of last power-off state, and then it will successively indicate the 9th and 8th etc. from the left along with the battery power going down. During power indicator in critical alarm,it will fluctuate between 1st and 2nd unit bar, accompanied by the indicator shining back and forth. The indicator of panel alarm is able to flicker, while there is only one unit bar shining from the left.
d) Hour meter
Hour meter commence timing after power on, recorded as 0.1H for every 6 minute, along with function of accumulative memory. It is real-time display without shutdown and the maximum error is usually within 5 seconds. Besides, the maximum error of shutdown memory is actually controlled by within 1 minute.    

Hefei Huanxin Technology Development Co., Ltd. has been devoting ourselves to developing and manufacturing and other since 2004. We are located in Hefei, Anhui Province, with convenient transportation access. We employ over 101 - 200 People staff members. We have achieved great improvement since our company was founded in 2004. We abide by the motto of Firstclass quality, Reasonable price, Best service and Professional product support. 

1. By Couriers: DHL, UPS, FEDEX, TNT are the main courier companies we are cooperating.
2. By Air: Delivery from the Shanghai airport to customer's destination city air port.
3. By Sea: Delivery from the Shanghai sea port .