Products & prices
China-made alarms operate at 303, 315, 360 or 433MHz, and their sirens have sound pressure levels ranging from 100 to 130dB. Low-end types use fixed or code hopping technology, while midlevel and upscale variants adopt the latter or rolling code. Some employ fingerprint recognition as well. One-way systems constitute more than 70 percent of output and exports. Most have two transmitters with three to six buttons supporting basic functions such as arming, disarming, mute arming, car locating and trunk release. In two-way sets, at least one transmitter has an LCD or LED screen showing the vehicle’s status. An alert is triggered at four types of intrusion, including that of the door or trunk opening. Value-added features include time, battery voltage and temperature display. Prices of car alarms begin at $6, while units designed for motorcycles are available starting at $5. Quotes increase based on the system’s transmission distance, international certification and functions. In the first category, models not exceeding $14 are generally one-way versions with five to eight customizable functions and an effective range of less than 200m. Often bearing the CE mark, these are fitted with ICs from Shenzhen, Guangdong province, or Taiwan. Models quoted between $15 and $27 consist of one- and two-way systems employing ICs from South Korea or Taiwan. Designs are configured with eight to 12 programmable functions and have an operating distance of 200 to 500m. Value-added attributes include an audio warning, a personal override code and remote power window roll-up. More expensive car alarms are two-way systems with 10 to 15 customizable features. Fitted with ICs from the EU or the US, these are capable of transmitting over an expanse of up to 1,000m. Among the functions usually integrated into such designs are keyless entry, remote engine start, real-time in-car temperature display and battery voltage monitoring. Compliance with CE, FCC and E-Mark requirements is common in the midrange and high end. For motorcycle alarms, options at the $5 to $12 segment are one-way types with a transmission distance of about 100m. Two-way variants are at least $10 for sets having a range of 100 to 500m.
|