Present, there is a variety of types of attendance, the price also varies, many users can not start in the purchase. Here's the brand and how to choose the right features to talk about attendance. Attendance is divided into two categories: 
 A mechanical punch card machine 
 Attendance built-in printing device that can print directly to the original attendance records, class punch card punch card machine is divided into electronic and mechanical punch card machines. Brand electronic punch card machines are now "in control", "Comet" and "HW", etc. Its main advantage is that when not clocking noise, smaller, when the automatic suction punch card, back card. The disadvantage is applicable to small number of people, generally use less than 100, the retail price is about 2000 yuan. Mechanical punch card machines are on the market, "Boli De", "Lux" and "can reach good" and so on. Its main advantage is strong, durable, bulky. Drawback is that accuracy is not high, when not clocking noise, manual card feed, it applies to the number of large factories or more units. The retail price of 1,000 yuan to 3,000 yuan per month. 
 Second, the credit card Attendance 
 Main points card, barcode card, IC card categories. Currently the most widely used is the magnetic card and bar code card attendance. Mainly in the control subjects close Haoshun out, with its price of 1,500 yuan to 3,000 yuan. Summary of the main features of the original data using a computer, printer finally played through the reports, queries, more convenient way. But the high price, the operation is too much trouble. Generally more suitable for unit staff, work schedules are more the rule units. IC card attendance is just the most recent rise of a new model. Its main advantage is ease of use, lower price, and in many units to achieve a card, that is, with telephone, Canteen system connected. IC Card Attendance 1,000-odd single, and 2,000 yuan networked with Windows software. Stand-connected printer to print only the raw data and abnormal data, currently popular in the market. Especially for small businesses. Also note that electronic punch cards and IC card attendance is on the market mainstream products. When you select the time and attendance system, it's best to ask a few people who have had experience with, and perhaps be closer to the ideal and the reality of some, is hard to find the perfect. 
 Three different types of machines and the advantages and disadvantages of attendance 
 1, the mechanical advantages and disadvantages of punch card machines (a combination of mechanical and electronic) 
 Advantages: Simple and intuitive, no computer knowledge, the price is relatively higher than at the end (Office Supplies stores) 
 Disadvantages: Statistics cumbersome, replace the card each month, a higher rate of mechanical failure (the slot sensitive) 
 Scope: a better environment and less than 100 units 
 2, magnetic Attendance advantages and disadvantages 
 Advantages: You can use computer statistical attendance data 
 Disadvantages: Magnetic and head wearing (there may be more reliable magnetic devices) 
 Scope: good sanitation, personnel and high-quality sites (used for access control, banking, etc.) 
 3, IC card attendance of the advantages and disadvantages 
 With the same magnetic card, IC card socket is vulnerable place. 
 4, bar code, the advantages and disadvantages of attendance 
 And use the same card 
 Advantages: Optical read the bar code card number, the failure rate 
 Disadvantages: easy to counterfeit cards (except for special cover stock bar), the sensitivity decreases after the bar code is dirty and wrong code 
 5, radio frequency card attendance of the advantages and disadvantages 
 Advantages: non-contact card reader, card no wear, no error code 
 Disadvantages: high cost of the card can not be resolved \ "pinch card \" problem 
 6, fingerprint attendance machine advantages and disadvantages 
 Advantages: no card, to solve the problem Doug card 
 Disadvantages: requires a good quality of personnel, fingerprints should be clean and prevent damage to the ability and stability to be improved (currently in its infancy). 
 7, eye rainbow attendance machine - ideal for Attendance 
 Advantages: the human eye to identify the characteristics of different people, so that the non-contact method to identify the person's characteristics, identification speed is less than 1 second. 
 Disadvantages: The current high cost. 
 8, all the essential quality of attendance should be 
 Time accurate attendance data less susceptible to interference loss or confusion (occasionally it is inevitable), and stability of computer communication 
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