The Tektronix 200-Series were miniature portable scopes, most of which included internal rechargeable batteries.
208 − ECG monitor
211 − 500 kHz miniature single channel
212 − 500 kHz miniature dual channel
213 − miniature 1 MHz scope + TRMS digital multimeter
214 − 500 kHz miniature dual channel storage
221 − 5 MHz miniature single-channel
222 − 10 MHz dual-channel digital
222PS − 10 MHz dual-channel digital
224 − 60 MHz 2-ch compact
